Some of the prettiest scenery is around Chisos Basin so, if you can't camp there due to RV size, you will want to drive there in your toad/TV. Last month I camped at both Chisos Basin and Cottonwood, both dry camping. Cottonwood is not size-restricted and is very quiet. I tested out my 4WD and clearance on the Old Maverick Rd. Previously, I have been several times to the Rio Grande Village campground, both the 'dry' area and the much smaller (and tightly crammed together) hookup section. There are several trailheads there and the birding is great all over BBNP. Enjoy!