Well, goodness, sounds like you two are really going to have a livable/trailable combo. NH is top of the line in anyone's book.
PHD/Colonel--doubly impressive.
Be sure and check out the HDT sections on many of the RV forum websites. And there is an annual meet of HDT rigs in Hutchinson, KS, that might be good to check out.
The Alaska round-trip is a fantastic adventure, and 4 months the first time was not enough. The Milepost map/info is first item to get, and subscribe to NorthtoAlaska.com for lots of good stuff. All of the Canadian Provinces/towns have tourist info to be asked for, and lots in AK also. Start gathering it all up...
She deserves a long, relaxing trip with no military worries.