I was out at the south site on Wednesday, and decided to scout around for you a bit. I found a well used spot to the south of the main area on one of the trails that would allow you to shoot at 225 yards directly into a very high hill. It appeared to be totally safe to me.
Tim has some good suggestions. Taking it to a real shoot without prep would be like going to a shooting match with a gun I've never fired and loads I've guessed at aqnd never worked up. I prefer to totally miss targets without a lot of people watching.
I opland to do some short range shootng and gradually work out to longer ranges.
Steve