As other people have mentioned, there are some sites that have small shelters built over the picnic tables, but I couldn't figure out a pattern to them, so it would be difficult to reserve ahead. (Also, many of them were at the RV sites--which have water and electricity but no sewer connections--which seemed like a waste since RV's come with built-in shade. Luckily, we had brought an 8' square canopy which was a lifesaver. About 15 minutes from Alamogordo and 30 minutes from White Sands, so convenient, too. It seemed to be full on Friday night but only half-full on Saturday night. (The Trinity Site was open on Saturday, so my guess was that some people went there and then moved on.) Nice flush bathrooms with free showers, and there were additional spigots and vault toilets for backup. Didn't go on it but the Dog Canyon trail looks like a beast and started from the campground. Highlight was definitely the views, especially during sunrise and sunset. The sites across from us ($42 and #44) would have been even better for views (though neither had the prized picnic table shade!).