I'm not an expert, but i'd start with identifying a area and then call the realtors, maybe get a subscription to a newspaper so you can track the want adds.

I'd recommend keeping yourself within a short enough drive that you could do a day there and still get back by evening or in a weekend. That way, you don't have to take vacation time and all you need is a tank of gas and some petty cash.

Inevitably, people who buy land for this end up wanting to do little projects and so forth on it. It might simply be building a deer stand, maybe erect a cabin or something. The idea is get it close enough to allow you to make a run and do whatever, yet be far enough that it is a true getaway.