Come back in the winter. They let the road snow shut and it's a great snowmachine trip. Drive in a little ways from Cantwell, park the rig, unload the machines, and head for Paxon Lodge for the night, then return the next day. You do need to check if any of the places are open along the way for gas or else you need to haul a sled loaded with gas.
Try to pick sunny weather so you can make decent time. If the clouds are down on the deck causing flat light, you'll be long time on the trail. Better to wait until dark when the headlights can hi-light the bumps for you. And you should see what it's like out there when it's snowing and the wind starts to howl.
Bill