A mountain bike makes a good hunting vehicle. You can get a long way down the fire road before most guys are too far out of their trucks. You can even balance a deer over the seat and handlebars, though you will want to wash down the bike when you get home and be sure to put orange all over the deer first. A good "biathalon" sling will carry your rifle centered over your back so you don't need any clamps or stuff. If you put a piece of red plastic over your headlight you can even ride pretty well before sunup without loosing night vision or spooking deer.