Some of the reviews I read suggested that you need a four wheel drive vehicle to make the drive up. Maybe when it's wet that might be the case, but it was dry when we were there and we had no problem making the drive in a Fiat 500. If that little car can make it, any car can make it. Yes, you need to take it slow and easy, it's a rough, steep, gravel road.
We stayed in the tent campground. Peaceful spot, every star is visible. All of them. Beautiful sunrise in the morning viewed from the rim trail. Wish we had longer to explore, but we were off to Devil's Den right after breakfast. Hope to make it back some day.