A lot of AMPs sit off of main highways. Like Sunstar in Pittston - I went there once and I thought the parking on the side wasn't too bad, but after I was done and tried to turn onto the road I had to sit there for a while as busy traffic drove by - which wasn't private at all. I've only been to OE once, but it seems to be about as private as you can get.
Anyone know of any, more private, locations around WB/Scranton?