Sounds like you got some good input already. I run into the same problem at times because I also hunt only public land. It's frustrating when I hear buddies tell me they have seen 20 deer and 12 of them bucks. I have been told that if you have well worn areas chances are those are night trails/activity area. Like someone already said follow those trails and see where they go and come from. In the AM get as close to bedding area as possible. You nearly do the same evenings. This way you "catch" the deer at first/last light. I had a favorite spot I hunted in the AM ... One day I said what te hell and turn my stand around and hunted it in the evening. To my left right at dark it sounded like a heard of cattle coming off the ridge. They were out of range but i finally found where they had moved to so I just adjusted as necessary. Also, keep a good look out in the distance. Deer may be in the area just not walking near your stand. I also like to "take a look around" after AM hunts. Do some late morning scouts. My buddy and I did that one morning and found a nice little area where the deer move through. He ended up shooting a huge six point the following morning. Keep at it and don't get frustrated. Public land is a b/*#h. You have no idea what other people are doing. Good luck!