Some good advice so far. As for feeling guilty about shooting a deer consider this, a well placed shot from a hunter is better than being hit by a semi while crossing a highway.
Most hunters do respect the animals we pursue. As an example, a few years ago we were getting ready to leave our hunting area and a friend pulled up and said that a nice 6 point just crossed the road. I went back into the woods and set up on the ridge over looking a clear spot in the trail. As the buck reached that clearing he took 2 jumps and was back into the brush. The only thing I could see was the rack raised over the brush. I didn't shoot simply because I would be taking a blind shot through the brush. Deer are a beautiful animal and I enjoy the hunt even if I don't fill a tag at the end of the day. The time spent in the woods is enough satisfaction. Meat in the freezer or a rack on the wall is simply the finishing touch, or as it is said icing on the cake.