Review on CAMPING.
The only reason I didn't give this park 5 stars was because it was a bit out of the way. Otherwise, fantastic.
We camped at Brantley Lake State Park while visiting Carlsbad Caverns. While the maps may say it is 13 miles from Carlsbad, bear in mind that (a) the Caverns are a distance PAST the town and the drive will be more like an hour from the campground to the caverns, and (b) the "driveway" into Carlsbad is quite long (7 miles-ish) so just because you're at the entry doesn't mean you're "home" - it's a long ride on a slow road.
The campground is pleasant and quiet with clean bathrooms and hook ups. The picnic tables are covered which is great for the hot sun of NM. Camping sites are spaced nicely apart so you aren't all up in each others' business.
We had the pleasure of hearing coyotes early one morning before sunrise.
The only downside was that there is a grill but fire pits are prohibited (I'm guessing because of the dryness - thus fire threat - typical to NM) so campfires aren't really possible.