Admittedly I didn't read any of this thread, though I did quickly search it for keywords Has anyone driven the Dalton Highway or toured the Prudhoe Bay area?
Yes, and no.
It is generally unadvised, since:
1. it is hundreds of miles of dirt road that takes forever
2. It is against the rental contract.
3. It is highly likely you will get a flat tire or broken windshield.
4. if you get that broken windshield or flat tire, you will pay quite for a tow truck to come get you hundreds of miles (there is a gas station at about mile 60 and about mile 180)
5. You will be trying to get that hitch to the gas station to ask the tow truck to come, for a long time (no cell service)
and most of all:
6. There is NOTHING to do at prudhoe bay. The area is restricted, and they will not allow you to go to the ocean or see anything.
(I was hiking in the Gates of the Arctic, that is why I drove it, till just past coldfoot)