RE: how many deer
Not an easy question to answer. It depends on a number of things, most of which take time (sometimes years) to determine. How many acres are you talking about? What is the land compose of?...is it all timber and if so, what kind of trees do you have? Is there crop support in the general area? How mature is the timber? Do you have any food plots? Many, many things to consider when trying to answer this question.
My advice would be to talk to your local DNR folks to help you determine the answer to your question. They will be more in tune with the "Local" picture and probably able to help.
Good Luck.