Sorry I missed the start of this thread.
Some meta-advice -- the Milepost (big fat travel guidebook; issued annually, with the 2023 edition expected to go on sale next month) is very helpful for planning your trip, and helping you rough out your options.
The Milepost used to have simplified charts showing your ferry options for the main Inside Passage routes. That feature is long gone, the Milepost points you to the ferryalaska.com website, which as US41 and Rothman point out is rather user-unfriendly.
Google Maps doesn't show the Bellingham - Whittier ferry.
Because that ferry route runs only once every two weeks in the summer.
That caused some consternation, when some of us were planning an Alaska roadmeet (a smaller version ultimately happened).
A simplified version of the lodging situation (including along the Alaska Highway in Canada): four-walls-and-a-roof lodgings tend to be scarce and expensive, while B&Bs and campgrounds are plentiful and cheap (about the only non-pricey things in Alaska).
For both the Dalton and Dempster routes to the Arctic Ocean, two mounted fuil-size spares are strongly recommended, and both your spares and regular tires should be light-truck rated. Too many stories of flats for regular passenger vehicle tires. I followed that advice on round trips on both the Dalton and Dempster, never needed my spares.
The beach trip to the Arctic is more expensive in Prudhoe Bay than Tuktoyaktuk, but for some reason the water is less chilly at Prudhoe Bay, tolerable for a quick dip. Nobody went into the water in Tuk, with the sub-freezing wind chills the late summer day I was there.
As for the ferry out to Unalaska, when I went out there in 2007 (flying out, catching the ferry back to Chignik), I estimated the extra cost of taking my vehicle round trip on the ferry would've been about $2000. Not worth it. Better to make the trip sans vehicle.
For more info, aside from the Alaska roadmeet topic I mentioned above, I've posted on this forum and/or my Alaska Roads website lengthy trip reports for the Dalton Highway, the Dempster up to Inuvik, the new highway to Tuk I covered on a separate trip, and my visit to Unalaska/Dutch Harbor (got better weather than I expected).