If your a war buff, history buff or just looking for something different to do, this is the place for you. You can drive it, bike it or even walk it if thats your style (about a 26 mile course all together). Going through Gettysburg battlefields was an experience to say the least. My first impression (based on all the monuments) was a giant cemetery. But after driving through and walking around, reading the markers and battle descriptions it really puts you into the era and what was taking place. I visit the battle field on 3 seperate occasions as I missed things the first round. I opted to buy the CD and take the car ride on my own. I recommend this as I like to go on my own pace, however now after doing that, when I revisit, I would pay for a guided tour.
For my trip through the battlefields, I packed a cooler w/ water, gatorade and snacks. I saved alot of downtime and money this way not having to stop for lunch and wait for crowds.
I did walk through the downtown "square" which is loaded with little fun shops and plenty of dining options.
Overall, there can be alot of walking so be prepared for that. Make the best of it and don't hesitate to do the entire tour over 2 days or more. There is alot to take in all at once. I highly recommend 2-3 hours a day over 2 days or so. Early morning is nice for a beautiful sunrise just as evening for a beautiful sunset to the west.