I purchased the plot saver last sumer. It worked very well. Its basically white heavy duty banding material you spray with a deer deterant spray that smells kinda piney. The white branding moves back & forth in the wind. So it works alot like the white grocery bag idea. So you may want to try that, and maybe pick up some deer hinder spray to spray the bags, and posts.
Soon as I took the branding down the deer began entering the field using it. Bucks even rubbed the cedar posts during the fall which I found pretty interesting!