Welcome to the RTA Forum!
I think you are greatly overstating the challenges of an Alaska Roadtrip. Hundreds of people make this trip everyday, and there are no 800 mile stretches without gas. The longest stretch of the Alaska Highway without services is only about 100 miles, with gas typically being available every 20-50 miles.
This trip is so popular, in fact, that there is an entire annual guide dedicated to this trip called
the Milepost which I encourage you to read to learn a little more about this not-so-lonely road.