Thanks everyone for the great responses! It sounds like it's not unreasonable to make being able to shoot on the property a high priority criterion. I figured I would talk to the neighbors and let them know at least; I may try to meet some of them before I buy too. It would be a serious bummer to buy a property only to find out afterwards I'm going to have to fight with a neighbor for the rest of my life about shooting on my own land. It does sound like a wonderful thing, to be able to go out and shoot on your own property :-)
This is your best bet. Try to talk to your potential neighbors before you buy. The County has changed in the past decade. Used to be no problem to shoot. That is changing more and more every day.
LE seems to be bothered by the complaints of shooting noise as much as we are. One came to my place once and was mad because I didn't invite him. Pretty true of most of them.