I recently purchased some property and will be posting the property lines this spring. I have had several trespassers last fall and since due to the timing of the purchase (October), I did not post it right away. What is everyone using for posted signs? Tyvek? The plastic ones from Tractor Supply? Aluminum? Custom signs? I have a few fields that I will have to put signs on T posts so something with a backer would be ideal. How long have the signs lasted that you have chosen? I see several properties in my area that are posted the signs just don't seem to last and I do not want to repost every year.