if you get into wind, why not just shut off the motor and drift? A 5 - 10 mph breeze will provide plenty of action on your crankbaits
Problem with a low drift speed is that a crankbait would have to have almost a neutral buoyancy - any floater would swim too close to the surface.
Thanks all for more ideas and confirmation regarding fish and trolled crankbaits. Just seeing 2 decent crappies and a bass hit within 20 yds on a straight path was proof enough that when casting to areas isn't working, trolling may get it done!