We did some back country camping at Big Bend National Park. You will need an SUV or 4x4 for some spots, I did see some cars but they were struggling. We have a Jeep and had to help several people out. Pro tip: show up to get your permit early as it’s in a first come first serve basis. Scout out some sites so you have back up spots if the one you want is taken. We camped at Solis as it was the only one available. It was nicely laid out and super peaceful! After doing some driving around there are some other camps I would have rather had and will try to get them next time. Ours had a beautiful view of the mountains but would have like to been higher up. No complaints.