That's a buck of a lifetime..or at least it is from where I comefrom.
I wouldn't cut yourself short with a half day off. Give yourself at least 3 days. Just when you think you have a buck pattered they do somthing different. Make up a good excuse to your boss and don't mention deer hunting......that will probably get you fired or demoted. Definately take the three days though, you'll need it. If you kill-em on the first night....win win, go back to work early.......although I would probably need the other two days for some celabrating.
............Good Luck