I camped on the hill side in the Fox Run Loop. The campsites were pretty well spaced apart, but a lantern from from an adjacent campsite was able to shine into ours late at night. 

Overall, the sites are well maintained, and the bathrooms are very clean and well kept. It's near the Guadalupe river as well as other Hill Country attractions which makes this a good location. 

Remember to check in at the Ranger station over on the river side because you will need a gate code to access the hill side of the park.