The entrance road is a bit rocky and 4x4 would be suggested. Low clearance vehicles won't make it up with bumpers intact. One of the campers in my group has a 2wd Toyota Tacoma with a small lift that made it up without major issues.

The campsite was awesome and very peaceful. It did get pretty windy at night and it also dropped into the upper 30's. I think most of the campsites have rock fire rings in place even though it isn't "fire-friendly". I stayed on a Wednesday night and just about all the campsites were full. 

I have AT&T and had zero cell reception, some of the others had Verizon which had limited cell service.