I think that seriously was sarcasm, 3 days isn't that long man, i live right on the trail and am always hiking it and so on, take a look at the weather prior to leaving. A tent is important but honestly if your going for 3 days and the weather is going to be nice i would almost ditch the tent to save on weight. At least around me there are solid shelters along the trail, see if one if near where you will be hiking, living off the land will be tough"ish" the best wildlife you will be able to get is squirrel, there are also a million rabbits around because they just had there baby's a few weeks ago, I'm in ny pretty close to pa where youre at, in a few weeks the wild raspberry will be rip and ready to eat that should help too if you can find some.
^dont pack a gun, the trail doesnt promote it and its frounded upon a little as well, make sure you bring a knife and some rope however,
im actually thinking about doing a 200 mile go from me to near killington vt, should take about 2 weeks, well see if i get around to it though, have fun man the trail is awesome, you will definitely meet some great people along the way