I wish every town had a spot like this.  It's perfect if you just need a spot to sleep and park your vehicle while you explore the town.

This is a large dirt lot, located in Tombstone, where you can park for 24 hours ($10 for RVs and $5 for cars). Self payment required at drop box, cash only.  Find a spot that works for you and park for the night.  You can easily walk to Tombstone's tourist area from here.

Be aware that during the day you can hear the gunshots from the reenactment of the O.K. Coral gun fight, if you have nervous dogs.  The night was quiet and peaceful.

Good cell service. No amenities or services here, not even a trash can.  Did not see anyone who appeared to be a host, but in the morning the marshal came down and drove through the lot to check on things, which was nice.

There were only a few other rigs here when we were here (early Dec) but according to a local vendor the busy season here is late Dec to June so it may get crowded during those months.