Just me, but I rarely drop shot “inside” a brush pile. Not that you won’t get bit, but it’s not the most efficient presentation IMO. So I’ll drop shot around, next to, or swim it over cover instead. If I’m going into the brush pile, I’m usually throwing a jig or a TR plastic on heavier line. Before FFS, you either used lineups or shoreline references combined with feel, or graphed the pile, tossed a marker buoy nearby, then backed off and cast it. Years and years of doing this for both bass and crappie back when all we had were flashers and paper graphs, you got pretty good with the technique. Modern tech just makes it a breeze these days.