Guess I'll chime in to this thread. I was born and raised in Alaska on the Kenai but hadn't been back since '68 when I drove the Alcan. Retired last year so I decided to go "back home" for a spell this summer. Did it, had a lot of fun meeting up with old childhood friends and seeing how much things have changed - Yikes!
I drove my Class B and my total cost for the trip (gas, camping, food, misc) came to about $5,000 in about 11,000 miles. I did get 17 MPG though and I did a lot of dry camping and while in Alaska I camped for free in a friend's back yard with water and electric.
Definitely have to go back in 2017 for my 50th high school reunion, but I'll probably go back again in 2015. This time I plan on towing my Jeep Wrangler with me so my MPG will take a hit, but I'll have more toys with me for even more summer fun.
I traveled with a couple in their 5th wheel on the way up. (An old childhood friend and her husband.) Didn't feel I needed to, but she asked because her husband was leery about that trip without having someone else along. I came back by myself though. I'd be more than willing to travel with others when I go again, so if someone would like company just drop me an e-mail.