What I've tried to do is plant apple tree's that hold their fruit until late Sept. thru Oct. Our archery season starts mid Oct. It won't do much good as a attractant to our land if all our apples fell off by August. Where I purchase my apple tree's I look up the varieties they have in stock, and select the ones that hold fruit the longest. Northern Spy is a example.
I found its important to fence in the apples, becasue the deer will tear them up all summer, and winter if they are not protected. I lost the first few tree's I planted from deer over browsing them. They literally broke branches right off, and a few got buck rubbed. I have 4-5ft high fencing around them now. I also have a good mulch bed around the base to keep the weeds down, and to keep the moisture in. In the spring, and summer. especially rainy yrs. I spray all my tree's down with a fruit tree spray to kill insects that eat all the leaves, and to help prevent disease. A rainy yr can kill a young apple tree.