The casino at Hinckley has trailer sites available. It's about 1.5 hours out of Mpls. Just keep you money in your pocket :)
Otherwise there's a state park at Taylors Falls about 45 minutes north. But given the holiday weekend it might be tough finding a vacancy where ever you go.
Kayak Deck Gear Bags
Hardshell Kayak Sail Rigs
Classic Freestanding Rack