We've stayed here a number of times, always in March. Very nice, quiet campground in a wooded canyon with a small stream running right through the CG. There are 25 sites, mostly smallish, better suited for small rvs/trailers or tents. Not enough room for very rigs in here. 

Water spigots are scattered throughout, 1 restroom with flush toilet. Last time we were there they had an issue with water system and had to shut it off and bring in port-a-potties.

As far as other amenities, there's spotty cell service (at least Verizon) and Wifi at the visitor center not far from the CG. Nearest services and dump station are in Willcox, 37 miles away. There's also a gas station/convenience store at a place called the Mustang Mall (it's not a mall in the usual sense), 29 miles west of Bonita.

A number of good hiking trails, mostly up on top at Massai Point with a few additional trails starting at the CG. Our favorite is Echo Canyon to the Visitor Cntr.

One important note: Ground fires are not allowed (at least as of 2023), which means you can have one in the above ground little BBQ grill or you have to have your own fire pan to have a wood fire. Speaking of which, no wood is for sale at the Monument nor are you allowed to gather it.

So, bring everything you need!!