This state park is amazing! Facinating "live" cavern. They offer two tours. Both are about 1 1/2 hrs. and are worth doing both. Not your usual claustrophobic, climb down 200+ stairs, look around and come back up. This has a nice, wide meandering path in a very tropical climate for a cave. The grounds are super clean, spread out and has a nice butterfly/hummingbird garden, campground and hiking paths.
The campground has 62 sites, several pull through, W/E, showers, dump station and nice, wide and deep level sites for $25 a night. We will definately be coming back to spend some time next October.
Here is a link to the state park campground info:
Kartchner State Park Info
This is a great jumping off point to visit: Old Tucson, Tombstone, Biosphere 2 and Bisbee.