You'll notice that no one from Alaska has replied yet - probably all of us are just waking up and can't wrap our head around your idea....
The short answer is NO.
And the long answer is No, DON'T DO IT!
The RV parks shut down tight because there isn't enough business to keep them open, both due to winter operating expenses and lack of people staying in them. In Fbks, even some of the hotels winterize and lock up tight for the winter.
Bring the 5th up and stay in it for half of the year. But then find a place you can rent from Oct through probably May. RV parks should open some time in May. It depends on what the show level was for the winter which in turn effects how deep the frost level went into the ground which effects when they can put water in their water lines and keep them along with the sewer lines from freezing. They could still operate in Oct and maybe Nov because the ground isn't cold soaked yet, but almost all of them close down right after Labor Day due to lack of business (and maybe wanting to go south for the winter?).
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.