We are building a paver patio at ground level with three 3' pillars and a short seat wall. How deep of a footer should we set the pillars on? For short walls we use 6" compacted roll stone, any different for a freestanding wall? I thought we would bury one block then build up approx. 2' wall. I just want to be sure I'm not missing something. We have done patios and walls, but this is our first with pillars and fsw. Thanks is advance, really appreciate it!