I've got a large install with several hundred feet of wall. Some will be SRW, some Pa. Fieldstone and a 100', mild slope along the back will just get scraped, the base cut at an angle and filled in with irregular stone (medium to large sized pieces w/no drainage behind). The yard will be landscaped to the base of the irregular stone and what's above it will be left natural. Will I need to install a french drain along the base of this 'wall'? I don't have a great place to send the water...how about a dry well? I've never constructed one before and am wondering if any considerations need to be made with regards to what will eventually be placed over the backfilled well...patio, firepit or just lawn, does it matter? Thanks.