Busy but spectacular
This is a very popular area, but you can still find solitude if you want it. Plenty of activities as well; climb all day, check out Register Rock, or hike the City of Rocks Loop trail around the site to get a little bit of everything. We stayed with our 2 dogs in April, it was definitely warm in the sun, but very cool at night and in the shade. It is high desert, summer months must be stifling!
The sites are nicely spread out, with a few pit toilets and refuse cans between them. Check out the map on the NPS site and make a reservation to ensure you get the spot you want.
Month of VisitApril