As an ex resident of Alaska, the OP was unhappy as their expectations were for 5star accommodation.
To see Alaska fly to ANC and rent a car. 2 nights in ANC, 1 Airbnb in Healy to see Denali, 2 in Fairbanks, 1 in Glenallen at a BnB and back to ANC.
A personal comment that Whittier is pretty grim. Seward is great with lots to do especially the all day Kenai boat tour and Exit Glacier. Thus we usually cruise other than Princess.
PS - need to remember most places in tourist areas are open late May till Labor day. Clean basic accommodation. Need 5star suggest visiting a place without a 20000' mountain and heaps of wildlife like New York City.