We want to hit dunes, trails, and back country.
You can't do that with the truck?
One is a little 50cc for my son.
Oh, ok, it's a family trip --- I didn't think about it like that. With the ATVs, everyone can drive ...
Two fast two strokes for the dunes and two utility four stokrs for criusing the back country. Plus, the collest thing is they are three wheelers. I love trikes.
Sounds like it's going to be a lot of fun
However, if we were to stay on the road the whole time I would certaily agree with you.
No, I didn't mean you to stay on the road

The disadvantage of a trailer is that you need to stay on the (main) roads. I often found small roads that looked interesting and which I would have tried out, but with the camper in tow, I didn't because if you tow a camper on bumpy roads, it will fall apart after a while --- or the road was too small and might have ended somewhere where I won't have been able to turn. But maybe there are no such roads in Alaska ...
What is a parking heater? I have never heard of one, it siunds like somehting we should invest in.
That's a device for heating a vehicle, usually while the engine isn't running. They burn some fuel to produce the heat --- either gasoline if you have one built for gas, or Diesel/Biodiesel/Kerosene/heating oil if you have one built for Diesel. You can get them as air heaters that blow out hot air, or as water heaters that heat water. The water heaters usually heat the engine coolant; if you want to heat the cabin, you'll have to run the blower. The air heaters just heat the cabin directly --- they need less electric power than the water heaters.
Which one you prefer depends on the purpose: If the main purpose is to warm up the coolant to help with starting, you get a water heater. If the purpose is to heat the cabin, you get an air heater. If you want both, you get both ...
They are awesome, but pricey. I had an air heater in the Tahoe because I was sleeping in it when I was on vacation and because it's extremely helpful when you don't have to sit in a cold truck when going to work until it's warmed up (which took about an hour for the Tahoe, and everything behind the drivers seat didn't get warm and I always had a cold back on the seat). I used to have a cold every winter, but after I got the parking heater, I didn't get a cold anymore. I've been sleeping in it when it was about 0F outside, and it was nicely warm inside

After a few days in the cold, you run the parking heater every time you turn off the engine for more than 10 minutes ...
Since they are pricey, it makes you think a while about getting one --- but after experiencing how great it is to have one, I wouldn't hesitate if I were living where it gets cold. I even want to have one here in Texas so that we can go camping in the winter --- it's too hot for that in the summer and can get too cold to sleep in the truck in the winter. Once I have money to spend, I'll probably get one ...