We stayed 2 nights at Catalina State Park in early May. We were in site B48 - this site was at the edge of the loop so it was nice and fairly private - but there was very little shade. I probably wouldn't pick that site again in the warmer months! There were a lot of other sites that had some trees around them and seemed much shadier. Campground was very clean. Bathrooms were spotless with giant free showers, which was awesome. The bathrooms were a pretty long walk from our site (there is only one bathroom facility for that loop). There are some trails in the park. We saw (and heard) coyote, prairie dogs, and a rattlesnake eating a prairie dog along a trail right behind our campground loop! We explored nearby Tuscon (interesting town with really cool murals and a great craft beer scene) and Saguaro National Park (about 30-45 minutes away). The park is very quiet and peaceful, yet very close to stores and a main road if you need anything. The campsite we were in had full hookups for electricity and water (we were in a campervan and didn't need them but it was nice to have access to).