I've only done trolling once since I got my boat, last long weekend on pike/pickerel opening up north, we used 2 hook harnesses with green spoon and a little floater on them, they seamed to work well in brownish water with live worms and plastics, we even caught a 30" pike on a plastic worm and we kept the boat at idle speed for the 15hp motor which was around 1 mph
Like other guys say here, don't let your line drag too long, increases the chances of snagging.
Good luck!
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