It's funny you should ask about caving, because I think being underground had a naturally therapeutic effect. I felt safe, cradled, calmed, and connected. It's something about the earth. I get a similar effect from swimming. Also, caving is often mostly men and I do better with structured groups where the hierarchy is obvious. ASD people are oblivious to informal or unstated hierarchies OMG! I sort of wonder now if a lot of cavers aren't neurodiverse!