Check out this link to the Minnesota Department of Natural Resources’ Water Law Basics and ’Pardon Me Myth! - Who Owns the Lake Bed?’
Minnesota has riparian water rights. People can be anywhere on the water as long as they gained access to the water legally. Even if the land under the water is privately owned, the water above it is available to anyone owning shoreland. Where the public is a riparian landowner, such as a public road or at a public access, the public has riparian rights.