RE: What do I do?
If you have a dog, take it with you to assist. It doesn't take a special breed. If you don't have a dog, get one from a friend. If at all possible, next year train the dog to find the deer. It only took my dog one session to figure out what I wanted him to do and he's not a tracking breed. Even if you know where the deer is and know that it is dead, leave and get the dog, train it to find the deer. Once it does, reward him/her with great affection, even if the dog didn't really find it. It will pay off big-time later.
Good luck,
KP