Since it's a small amount of acreage, I would focus on quick and easy tactics to draw in bucks from the surrounding properties. Establishing a few salt licks in sheltered areas would probably be helpful.

I don't really see clearing trees as being helpful if your getting a good mast crop during the year. If your not getting a decent mast crop then very selective harvest would help and you (or the landowner)could potentially profit from harvesting a few oaks.