Suggest looking on Craig's list at the boats that are selling in AK. You might be able to buy a new boat in the lower 48, fish out of it while on your trip and then sell it before you leave and still make a few bucks! I am amazed at the prices of jon boats in AK, especially if they have a jet drive!
Just another data point for you!
2004 Travel Supreme 38DS04
2009 Ranger 4X4 Towed
Ready Brake, Tire Minder