I was lookin’ for info on the river this week before I went out. I called marinas and guides and got mixed reports. I decided to call the Army Corp of Engineers and this website was on their recording:
water.mvr.usace.army.mil
This site has what you need to know about the Mississippi before you go out! There’s also info about other rivers around the region. This is info from the Rock Island District which, to my surprise, covers a very large area. If you’re not in this area I encourage you to find the Army Corps of Engineers website for your area. You will not be disapointed.