In your situation you need to look for native habitat spieces that are already in your hardwoods and juice them up. Much cheaper than a food plots, more difficult to learn about, but I believe they can be just as significant as food plots maybe more. For summer forage fertilize briar patches, (this next will get some looks) poison ivy is near 11% protienis a native food for deer. Then pick out some oaks and persimons fertilize them each year. Remember oaks may take two years to increase there production.