You can reserve a few van/RV spots but most are first come first serve. Don't worry about the check in time - all hookups and bathrooms/shower are unlocked. If you get a reserved spot you can pay online, otherwise self pay AT the campground, not at the gate (just in case they're full). Showers are good. Ok playground for little kids (4-5 age). Every site has a covered picnic table with stationary grill.

Convenient to Carlsbad, 30- 40ish minutes? north of the caverns, little over an hour south of Roswell.