It will be a great trip even without excellent DX.
I've been promised a trip to Gates of the Arctic NP if time permits, which should bring hours of interference free listening even if it is just dead air.
Oh, natch! Alaska is a lovely state. There's more to life than DXing.
Seriously, on my trip to Alaska years ago I found it to be really beautiful. Wish I could've gotten up to the Arctic NP.