We took our truck camper all the way up the Dalton to Prudhoe Bay. It took us 5 days round trip from Fairbanks, and was one of the highlights of our summer. I would NOT take a trailer or motorhome up there.
You can dip your foot in the Arctic ocean but it has to be on a tour bus and arranged 24 hrs in advance for security reasons.
Arctic Circle was Blah, but Prudhoe Bay was cool, as was the drive up there.
We didn't do the Dempster but I wish we had.
Oh and anyone who wants to see the Northern lights, make sure you stay until the end of August.
Was one of the highlights of my LIFE.