We troll every now and then for crappie where I'm from in MN. We always use something that wont dive any deeper than 2 feet max and move pretty slow because Crappie like to attack in an upward fashion.

I usually Crappie fish in my parents pond in North Georgia. I do not troll because it is just too small, but I use beetle spins, small tubes, and small crank baits. I choose a bright color because the water is dark. I know this is probably the polar opposite of how you fish but I thought I would share.

We troll for perch, we will drop a worm harness with green willow blades preferably,with a bottom bouncer sinker at about 14ft, not mmuch of a crappie guy