Our favorite is the Spencer Canyon site at 8,000 feet. It's best to try to get there early on a weekday to watch the deer foraging for half-empty chip bags. They have pit toilets, running water, tables, grills, nearby dumpsters and bear safes with securely shutting doors, although we're not sure how you're supposed to talk the bear into getting inside. The fee last time we were there was $7 to camp and park one car, $5 for each extra vehicle. We says skip the the $5 Santa Catalina Day Pass fee on the way up, if you're not stopping anywhere else. Good old Mount Lemmon--give it a squeeze.