Upper MIssissippi Navigation and Launching?
I would launch in Elk River. The area around Dayton is really shallow and filled with large rocks. If you launch in Elk River you have to immediately cross the river to get into some deeper water. From there you can make it up to Moniticello. The Elk River launch is under hiway 101
Hope you did not try it in a prop boat! The park in Anoka has a ramp fight off Highway 10, but I had a window smashed in my truck and was robbed there last year. Not good for prop boats or vacationers apparently. The entire Mississippi RIver from the Twin Cities upstream forever should not be fished with fiberglass unless the water is quite high. In fact, if the water is a bit low, a jet boat operator still must be quite careful.