In Minnesota, you are in a very special fishery where the jig is THE lure at all times. There have only been a handful of times in the summer time where i have seen it outfished by a worm or fast action plastic for the big fish. The jig is very easy to use out there. In the fall, i would definitely tie that puppy on and make it the priority. If they don't bite the jig, consider a lipless crankbait and rip it off the existing grass. If there is literally no vegetation like you are hinting towards, dig a crankbait out there. And of course as the water is getting colder out there, the jerkbait (hard or soft like a fluke) will work. But if you want the giant, the jig is just the smartest way to go. If you watch any MN bass fishing videos online, people will use the jig with more success there than other states. The jig will catch you nice fish anywhere, but in MN, i think it is even better. There are just so many lakes out there that if you are frustrated with Tonka, fish elsewhere, get a guide on Tonka (my brother in law did that and loved it and learned a lot), or spend more time studying the contours and structure of Tonka and just put your time on the water. Fish the jig jig jig jig jig jig jig jig. Like those infomercials saying the same word over and over again. jig jig jig jig jig jig jig jig.