Annual average temperature runs from 50 degrees in the south to 39 in the north
Keeping a camper working past October
Wisconsin’s camping season has a hard edge. Water systems at state parks and forests, including flush toilets, showers, drinking fountains and dump stations, may be unavailable from about October 1 to May 15, and northern campgrounds set their own dates; Big Lake in the Northern Highland-American Legion runs April 30 to November 1.
So the service questions are winterising, heat, insulation and holding-tank management for a rig that is used, not stored, through the cold months. Ask how a shop handles a camper that has to be functional in February.
A camper van, truck camper or expedition vehicle has two sets of systems, and most mechanics only want one of them. RV and van service centers work on the living side: the 12-volt system, heat, water, ventilation and everything that leaks or rattles loose after a season of dirt roads.
Typical work
01House battery, charging, solar and inverter diagnosis
02Diesel and propane heaters, and water heaters
03Plumbing, pumps, tanks and winterizing
04Roof fans, air conditioning, windows and seals
05Appliance service and leak repair
How to choose a service center
These systems are brand-specific, and so is the training.
01Ask which brands of heater, battery and inverter they are trained on.
02Ask if they will work on owner-built or small-builder vans. Some will not touch wiring they did not install.
03Ask about turnaround in season. Service backs up in spring and summer.
04Bring documentation: a wiring diagram, a component list and photos from the build.
What to have ready before you ask for a quote
Model numbers save a phone call.
01The vehicle or camper, and who built it
02The components: battery type and size, inverter, heater model
03What it is doing, and when
04Photos of the installation
05Where and when you can drop it off
Questions people ask
My heater stopped working at altitude. Is it broken?
Maybe not. Fuel-burning heaters can struggle at high elevation and may need an altitude setting or kit, and they soot up if they only ever run on low. A service center that knows the brand can check it and set it up for where you camp.
Can a shop add solar or lithium to an existing system?
Usually, but lithium batteries need compatible charging from the alternator, solar and shore power. A shop should look at the whole system rather than swap the battery and hope.
How do I winterize a van?
Drain or protect anything that holds water: tanks, pump, lines, water heater and filters. How you do that depends on how the system was built, so ask the builder or a service center to show you once.
How high is Wisconsin?
From Sturgeon Bay at 603 feet to Timms Hill at 1,951.
Altitude decides what your engine, your brakes and your lungs have to work with, and how late in the year the passes open.
02,000
Feet above sea level
Towns
Three LakesEnd of the auto tour and the town the 15-mile Heritage Drive Scenic Byway runs east of.1,665 ft
Boulder JunctionVilas County, in the northern part of the Northern Highland-American Legion, close to its rustic campgrounds and boat landings.1,651 ft
Eagle RiverEagle River-Florence Ranger District office. The forest’s Natural History Auto Tour starts here and runs north on US 45.1,647 ft
MinocquaOne of the two towns the DNR names as the heart of the Northern Highland-American Legion State Forest, with Woodruff.1,602 ft
RhinelanderSupervisor’s office for the whole Chequamegon-Nicolet, and the practical service town for the Nicolet side.1,548 ft
GliddenEast end of the Great Divide Scenic Byway, with the Great Divide district’s other office.1,520 ft
Park FallsMedford-Park Falls Ranger District office and the base for the Flambeau Motorized Trail system.1,516 ft
MedfordSouthern gateway to the Chequamegon side, on WIS 13 and WIS 64. Both Perkinstown trailheads are reached from here.1,474 ft
FlorenceNortheast corner of the state, with a ranger district office and the forest’s Wild Rivers Interpretive Center.1,301 ft
HaywardWest end of the Great Divide Scenic Byway and one of the two Great Divide Ranger District offices.1,193 ft
St. Croix FallsOn the St. Croix at the Minnesota line, by the Saint Croix National Scenic Riverway and the Governor Knowles State Forest.923 ft
Black River FallsBeside I-94 at the Black River State Forest, where 34 miles of state forest ATV trail join the Jackson and Clark county systems.794 ft
BayfieldHeadquarters of Apostle Islands National Lakeshore, on the Lake Superior byway. The islands themselves are reachable only by water.656 ft
AshlandThe Lake Superior byway leaves US 2 near here and runs up WIS 13. Home of the Northern Great Lakes Visitor Center on the national forest.648 ft
Prairie du ChienWhere the Great River Road meets the west end of the Lower Wisconsin River Road, on the Mississippi.641 ft
Sturgeon BayStart of the Door County Coastal Byway, which splits north of town onto WIS 42 and WIS 57.603 ft
Passes, high roads and summits
Timms HillThe highest point in Wisconsin, in Price County. The USGS publishes 1,951 feet; our own reading of the elevation surface gives 1,9521,951 ft
Sugarbush HillA named summit in Forest County, on the Nicolet side. Measured here from the national elevation surface at the summit’s map coordinates1,936 ft
Rib MountainThe high ridge above Wausau in Marathon County. Measured from the national elevation surface1,917 ft
Mount WhittleseyA named summit in Ashland County, in the high country south of Lake Superior. Measured from the national elevation surface1,873 ft
Saint Peters DomeA named summit in Ashland County, on the Chequamegon side. Measured from the national elevation surface1,561 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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