We were just in Tombstone yesterday and parked our 33’ RV in the lot so we could check out Tombstone. The sites are clearly marked and spacious so you can put out slides and steps.
The parking is paid based on the honor system (an envelope to write in your vehicle info and include your cash payment, then drop into lock box). It was $10 for the night, which we happily paid so we could check out the area. This is a level gravel lot, with dry camping spaces only....no amenities or hookups, so go prepared.
The lot is a very short walk to the tourist areas in Tombstone, including the O.K. Corral, courthouse, dining, etc.
We were sad we had to start our journey back to Texas and unable to stay the night. I’m sure the stars are beautiful at night. The view of the mountain certainly is!