A group of us did it last year. A well built 66 on 35's, a Gen 2 Raptor, a box stock 2017'ish F150, a well built Rubicon, and a stock rental Jeep.The road is not all that tough... I don't think the Bronco or the built Jeep ever put their T-case's in 4WD. The Stock F150 might of had to take a 2nd run at a section once or twice but noting drastic. The Raptor's width was tricky at a few points along the way.
The scenery is stunning! If I was going to do it again it would be worth it to hike into as many of the ruins as you had time for. They are not marked directly, look for signs on side trails that say "No Bikes beyond this point" and you are close.