What an absolute scam! They provide you with a guide book with destinations that cannot possibly be reached in the 4 hour limit. We rented the vehicle, checked everything out on it before we left and got on our way. We immediately headed towards the old Denali highway to see what was there. We saw some places to pull off the road along the way, approaches and the like so that we could be out of the way of the traffic. We also pulled into a few different camping locations to go to the bathroom, then once we had about an hour left we turned around and headed back to return the vehicle. The guide was there waiting for us, we collected our things and he said we were good to go.
There was no checkout done, I had assumed that when he said everything was good it meant just that. A few days later we get an email saying that we damaged the vehicle and there were severe scratches on both sides and the hood and were demanding we pay $1400 for damages. They refused to provide any kind of pictures, evidence or proof of damage or an invoice for the body shop that had to do the repair work.
They claimed that we went off their established roads, there was nothing saying we couldn't pull off onto approaches or into camping areas. We certainly didn't take that little POS jeep off roading to non established locations.
There is nothing in their visitor guide that you couldn't see with any normal rental vehicle, save your money and save yourself a scam. If you are there on a tour bus and don't have your own vehicle and want to rent something to drive around in for the day on paved only roads that are approved ahead of time by them, that's probably ok.
Do yourself a favor and take documented pictures and video of the vehicle before and after your trip and make sure the guide signs off the inspection sheet and gives you a copy before you leave or you may be in for a scam email just like us.