Hey Matt,
I grew up in the Harrisburg area and have lived south of Pittsburgh for the past 24 years. I have always said that Carlisle is one of the nicest towns in PA. As far as the Burg is concerned, it's all of the city most people need -- especially if you love the outdoors and hate traffic. I'm assuming that's the part of DC that you won't miss? Your wife and daughter will have plenty of places to shop but you will never be far from the woods. That's a good combination in my book. Enjoy the area and the hunting.
Craig