I'm looking at a strip of land out past Winchester for use as an 'outdoor recreation area'. It's not very big, only three acres down the side of a hill. I want to use it for camping, a Boy Scout training area

, and just a place to 'get away to' on weekends. I'd like to set up a small shooting area

where we can shoot black powder

as well as pistols and rifles. I'd be shooting into the side of a hill.
My question is, is three acres enough to shoot in? Mostly cans, paper and a few reactive targets.
Any suggestions on what I should look out for

or who I should talk to?
Thanks