I read the 2 star review about accessibility and a big rig. Well in my opinion big rigs are not what you need to take to dispersed camp site they are made for camp grounds. That being said the v shaped crater or what ever it was called is a joke our class c traversed all of it with no issues. Slow and steady will get you to some amazing camp sites. If you really want a challenge for your 2wd class c take a trip to Hurricane Lake AZ, beautiful place but really remote.
Nice free place to camp just outside Zion National Park. Access road is car friendly. Fire rings at each camp site.
Sunrise is amazing from this point overlooking lake Powell. Limited spots avaliable and it says free on the internet but there is a 14 dollar fee that is to be placed in an envelope/drop box.