Hosmer Grove and Kīpahulu, both at Haleakalā, both reserved ahead; our build of the federal recreation database
Vans and the sleeping problem
A van is the wrong shape for Hawaii’s campground rules and the right shape for everything else. State park campgrounds are not set up for camping in vehicles and sleeping in one in the car park is not allowed, with the single exception of the campervan permit at Waiʻānapanapa. Kauai County allows no vehicle camping at all.
So build the van to be legal where it parks rather than self-sufficient where it stops. Know which county you are in each night, carry the permit, and accept that on most islands a tent beside the van is what the rules expect.
A conversion is a small house on a moving, flexing, weight-limited platform. The builder insulates and lines the shell, installs the electrical system, plumbing, heat and ventilation, builds the bed, galley and storage, and cuts the holes for windows, fans and vents that you do not want to get wrong.
Some shops build complete vans to a set floor plan. Others build to order, and a few will take on partial work such as electrical only.
A typical conversion includes
01Insulation, wall and ceiling panels, and flooring
02House battery, alternator charging, solar, inverter and shore power
03Roof fan, heater, and sometimes air conditioning
04Fresh and gray water, a sink, and sometimes a shower and water heater
05Bed, galley, seating and storage
06Windows, racks, ladders, awnings and exterior lighting
How to choose a van builder
Floor plans are easy to fall for. The questions underneath them matter more.
01Decide between a shop's standard layout and a custom build. Standard layouts are faster, and the shop has already solved their problems.
02Ask what the finished van weighs with water and gear. Sprinters are sold in several gross weight ratings, and a heavy build on the lightest chassis leaves little margin.
03Ask how the electrical system is protected and documented, and whether the components can be serviced on the road.
04Ask how cabinetry is fastened to the van. Furniture that is only screwed to thin wall panels works loose on rough roads.
05Ask how added seats and seat belts are engineered and anchored if anyone rides behind the front row.
06Get the scope, price, payment schedule and delivery date in writing.
What to have ready before you ask for a quote
The van you order decides what can be built in it, so it helps to talk to a builder before you buy.
01Model year, 144 or 170 wheelbase, roof height, and two-wheel, all-wheel or four-wheel drive
02How many people sleep in it and how many ride in it
03The seasons and climates you travel in
04Whether you need to work from it
05What goes inside with you: bikes, boards, dogs
06A budget range and the date you want to be traveling
Questions people ask
Do I need to own the van before I contact a builder?
No. Many builders would rather talk first, because the wheelbase, roof height and drivetrain you order decide what can be built. Some shops can also source a van.
How long does a Sprinter conversion take?
A full custom build is usually measured in months, plus whatever wait the shop has before it can start. Standard layouts are quicker. Ask for both numbers.
Should I get the 144 or the 170 wheelbase?
The 144 is easier to park, turn and drive on tight roads. The 170 gives you room for a fixed bed and a real galley without compromise. Think about where you will actually drive it, then about how you want to live in it.
Can these builders work on a Ford Transit or Ram ProMaster?
Many do. If you are on another platform, say so in the form and we will look for shops with that experience.
How high is Hawaii?
From Kaunakakai at 12 feet to Puʻu Wēkiu, Mauna Kea at 13,796.
Altitude decides what your engine, your brakes and your lungs have to work with, and how late in the year the passes open.
02,0004,0006,0008,00010,00012,00014,000
Feet above sea level
Towns
VolcanoAt the Hawaiʻi Volcanoes entrance, where the park sells no fuel3,743 ft
WaimeaUpcountry Hawaiʻi Island, between the Kohala coast and Saddle Road2,666 ft
Lānaʻi CityLānaʻi’s only town, at 1,635 feet in the middle of the island1,635 ft
PukalaniLast fuel on the way up to the Haleakalā summit1,427 ft
HonokaʻaTop of Route 240 and the last town before the Waipiʻo lookout1,084 ft
NāʻālehuKaʻū district services on the belt road near the Kahuku Unit659 ft
PāhoaLower Puna, where the 2018 flows rewrote the road map649 ft
PāʻiaLast fuel before Hāna on the north shore road254 ft
LīhuʻeKauaʻi’s harbour and airport, and the island’s service centre207 ft
KapaʻaEast Kauaʻi services on the way to the end of the north shore road130 ft
HānaEast Maui services, 12 miles short of the Kīpahulu district129 ft
Kailua-KonaDry-side services and the long way round to the volcano54 ft
KahuluiMaui’s harbour and airport, where a shipped vehicle lands34 ft
WaimeaThe turn for the canyon road and the west-side approach to Polihale30 ft
HiloThe wet-side port and the fullest services on Hawaiʻi Island19 ft
KaunakakaiMolokaʻi’s one town, and the county campgrounds west of it12 ft
Passes, high roads and summits
Puʻu Wēkiu, Mauna KeaThe state high point, published by USGS. Our own reading of the elevation surface at its map point gives 13,79713,796 ft
Mauna LoaThe largest active volcano on the planet, covering half of Hawaiʻi Island. Our own reading at its map point gives 13,67413,679 ft
Haleakalā summitThe Park Service figure for the summit of the Maui volcano, reached by 11 miles of paved road above the entrance station10,023 ft
Haleakalā summitHaleakalā Crater Road to the summit10,023 ft
Maunakea Visitor Information StationMaunakea Access Road and the summit road9,200 ft
HualālaiOur own reading of the elevation surface at its map point, above Kailua-Kona8,269 ft
Puʻu LāʻauPuʻu Lāʻau Road7,000 ft
Mauna Loa LookoutThe end of the narrow one-lane Mauna Loa Road inside Hawaiʻi Volcanoes, and the highest point a road reaches in the park6,662 ft
Mauna Loa LookoutMauna Loa Road6,662 ft
Polipoli SpringPolipoli Spring State Recreation Area road6,200 ft
Puʻu KukuiOur own reading of the elevation surface at its map point, the West Maui high point5,788 ft
KawaikiniOur own reading of the elevation surface at its map point, the Kauaʻi high point5,212 ft
WaiʻaleʻaleOur own reading of the elevation surface at its map point, on the Kauaʻi summit plateau5,123 ft
KamakouOur own reading of the elevation surface at its map point, the Molokaʻi high point4,984 ft
KaʻalaOur own reading of the elevation surface at its map point, the Oʻahu high point4,038 ft
Kalalau LookoutKōkeʻe Road and the canyon rim, Kauaʻi4,000 ft
LānaʻihaleOur own reading of the elevation surface at its map point, the Lānaʻi high point3,379 ft
Pass, road and summit elevations are the figures published by the agency that manages them. Town elevations are the town’s or county’s own
figure where it publishes an exact one; the rest are from the U.S. Geological Survey (3D Elevation Program at the place’s official coordinates),
retrieved September 18, 2026. Every source is listed at the foot of the page.
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