When using retaining wall block to raise a patio, say 2 - 3 foot height is there anything that should be used to tie the wall back into the base of the patio? Geogrid? Or will the water be a non issue with a compacted base within the wall. I guess my question is, is there anything that needs to be done with the wall to keep it from coming down? What if it is along the side of a driveway where it is bearing a more significant load? Thanks in advance.