Make sure your truck is in good condition before you travel. Consider carrying an extra spare tire if you'll be making side trips. While you're on the road, keep an eye on your tire pressure and engine fluids. Mechanics are available along the route, but it can take a couple of days to get parts. Sign up with a roadside assistance program with your insurer or AAA.
Plan to travel in late summer, preferably early in September. This is best because by this time of year, the mosquitoes have died out. Many of the businesses along the highway are seasonal -- closed between mid-September and mid-May. June, July and August are peak season, so the highway and services along it are crowded. Late May is also a good time to travel, though you may run into inclement weather.
Install headlight covers. This will protect against gravel that's thrown up from the road and enable you to leave your headlights on at all times. Don't overload the truck camper. Carrying too much weight over rough roads can stress your axles.
Camp at government-run campgrounds. They're cheap and usually found within 30 miles of each other. They won't have hook-ups for your truck camper, but some of them have bathhouses with flush plumbing. There are also private campgrounds with full hook-ups.
Buy gasoline in the evenings before you pull into a campground. Gas is available about every 50 miles on the Alaska Highway, but stations might close early at night and not open early in the morning. The longest stretch without a gas station is about 100 miles long, located in northern British Columbia.
Supply the kitchen in your slide in truck camper. There are plenty of places to eat along the highway, but they can be expensive. Having breakfast in the camper before you leave your campsite is not only cheaper, but gives you more time on the road. Picnic lunches along the way give you more time at scenic spots.
