I'd say it's not so much about how big but more about what's around the land and what trees, food sources and nesting habitat the land provides? I hunt very small parcel of lands... Most times I hunt just a field corner without even going into the woods after them. If your 11 acres is adjacent to a field where gobblers strut, bingo. But if it's a wooden lot amoung other wooden lot, I would maybe feel less confident about it.