"...better ideas"?
Yep, but a question first: Why are you bringing a firearm to Alaska? Is it for a hunting trip? Bear protection on a true wilderness self-guided fishing trip? General concerns on the wild streets of Los Anchorage and Squarebanks?
Unless it's for a hunting trip, my personal view is that there is no need to cart a firearm in an RV up to Alaska....and if it's a hunting trip to Alaska, one probably wouldn't be driving. Most fishing guides don't want clients to have firearms and unless one is truly at a remote area, on foot, chances of running into brother bruin with a bad attitude are pretty small.
....and a bit of inquiry will identify the parts of Los Anchorage, Squarebanks, and the Meth-Su to avoid so that a defensive firearm is not needed.
If one is determined to carry, then ship it to and from. Least hassle, probably in the final analysis least expensive.