This park is great for two reasons.  First, of all the parks, this one has the best relationship with and access to the Mississippi River.  This is the spot most popular with fishermen.  Guys drive and walk right up to the banks and fish for mainly buffalo.  This local delicacy, usually fried as described to me by the guy I talked to.  You cast with heavy test line and poles that look like they are intended for the ocean.  These fish get big.