Mars is beautiful and rocky.
It's a beautiful spot and Charles was a great host. We only spoke over text, but he was very helpful and quick to respond. We were there in late May, so day time temps were hot, but the shade tree onsite works amazingly well to cool you down. The evenings were perfect though. The breeze blowing through felt great. Also, the place he recommends for fire wood is just a few minutes drive away and well worth it. The site was fairly well kept and the bathroom was clean. The cave-like formation near the site is also used for storage. It's initially a bit of an eyesore, but you don't notice after a while.
Overall, for what is offered, i feel like a $200 price tag is a little steep for a family of 4. For a large group, that would be no problem. It does have potable water, but it's right at the gate when you come in. So, if you don't trust your car to handle the rough road well, fill up on your way in so you don't have to make multiple trips.
The only other issue we had was finding a flat area to put the tent. For a large space that's seemingly used often, there weren't a lot of options for level ground. It'd be better to have a small trailer or rooftop tent here.
Over all, I'd come back. Probably during a cooler part of the year though.