RE: how many acres
People mention being adjacent to public land as a good thing. I used to think that was great too. But really it isn't! Land adjacent to public land has more tresspassing problems and the deer are pressured way more. Who wants to spend tens of thousands of dollars to hunt the same deer that everyone else gets to hunt.
If the small parcel is in an area with big land owners or land that just isn't hunted very hard then you'll be fine. If everyone has a 40 and invites 3 friends with them to hunt then you're sqrewed.
Just my two cents.