When most of us plan a trip North, Alaska is generally our goal. But, take Sue's advice and add to your planning, B.C., Yukon and maybe the Northwest Territories. They are all absolutely beautiful and filled with wonders and extremely friendly people. I have actually seen more wildlife there than Alaska. I do believe in making this trip you will find that the old adage about the journey being more important than the destination certainly will fit here.
Boondocking areas abound and I haven't been since 2010, but the forty dollar figure sounds a little high if you look hard enough.
Take your time and enjoy your trip , but don't bet on it being your last.