For $20 for the duration of the whole stay, a Resort recreation pass includes unlimited use water crafts (kayaks, paddle boards, waterbikes, etc.) and much more. The resort also has a large sports center, a huge indoor pool as well as whirpools and saunas. Also available are three Cragun's Legacy golf courses and pontoon/jet ski/speedboat etc. rentals, more details below.
The Legacy golf course offers a 9 hole Par 3 Course included in the recreation pass and 45 holes of championship golf, totaling 54 holes. Check out the link to book tee times.
The lake itself has numerous boat/jetski rental options as well as beaches/piers lining the sides.
If you wanted to spend some time in Minneapolis prior to or after the festivities, check out the largest mall in America with everything ranging from shopping malls to amusement parks and everything in between.