The ferry ride from Prince Rupert to Haines is awesome scenery and experience. Expensive though with a trailer due to length. We were at 42' long and it was almost $4k one way. Thx to my company for footing the moving expense bill!
Camped on the way up. Plenty of spots to boon dock for the night anywhere in N Canada and AK. If you want to camp in Denali or Chugach or any of the popular state parks or national forests I'd make some reservations now. Places like Lake Louise and Nancy Lakes are open but the popular campgrounds will be full.
It will be the trip of a lifetime. Can't wait for the 2nd summer here this year.