Moaning Cavern Parking Visitors to the deepest single chamber cavern in CA may stay overnight in the parking lot for $10. If participating in Rappel or Adventure tour, fee is generally waived. Restrooms open at night but no hookups or potable water. Many other attractions in ar State: California City: Angels Camp Nearest Town: Vallecito Status; Unofficial boondocking Cost: 10 or less Nearest Road: Unknown Scenery Rating: 3 Months Opened: Year Round Extras: Restrooms Number of Camp Sites: -