I'm going to home depot today to pick up a fence post for my dishes and wanted to know which one to get. I remember there being a thread about it a while ago but i can't find it. What should the gauge or wall thickness of it be? I know it should go about 3 feet into the ground. If I can get one long enough then i'll put both dishes on one pole, one on top of the other. If I can't then I'll get two posts.