We are looking at upgrading to a 45' DP however have no plans to take it north to Alaska. Lived there for 25 years, visited again in 2016 towing a 31' 5'er and finding places that will handle that rig was a challenge up north. Provincial CG's are not set up for longer RV's. Plus for more money you get less amenities at your sites. Yukon Provincial Parks provide free firewood. Basically a place to park for the night for what you would pay for a decent full service RV site in the lower 48 state. BUT, the scenery and experience is worth the trip.
Today's Class A coaches are going to all electric. No propane heat, cooking, ovens etc. At least that is what we are finding for our next RV. Either shore power or run the Cummins/ONAN generator.