Here's a couple more methods for you ! Try using a spinner , with a crawler , leech , or minnow , and long line it ( putting out more line than you ussualy do , 150 - 200 ft , and troll slow with that ! ) You can also put a split shot weight on to get it down further ! This method will also work with planner boards too ! Another way is to take a slip bobber , and put a jig head on , and slowly pull that around ! It will take a little bit to get the desired line distance from the bobber to the jig , and let it get back behind the boat aways . Hopefully you have a electric motor , cause the gas engine has a way of spooking fish in shallow water !!
YOUR MINNESOTA AND ICE FISHING MODERATOR, FLAGMANONICE......
God grant me the Serenity to accept the size of the fish I catch,
the Courage not to fib about it,
and the Wisdom to know that no one would believe me anyway