4 to 5 sounds about right for that acreage but having 12 that is crazy. I had 2 on one farm that's about 250 acres and 0 on another that's 450 acres. The 450 acres is new to me and hasn't been legally hunted in about 5 years. But after taking hunting possession of it, it was obvious that friends of the landowner were taking advantage of him and hunting without permission. I even caught one driving in there and spotlighting. We have put a stop to that and magically almost all his 2 year olds have survived this year. It's pretty obvious they were wiping out his 2 year old population with out him knowing it. We only have one buck in there over 2.5. Next year we should have a plethora of 3.5 year olds, and we might have one 4.5 or 2 if we pick up a new deer.