I can't remember the name of the marina I stopped in to drop the arch on a 52' Jefferson that's south of the fixed bridge, but I can look it up. I'm sure it's on the thread I posted about the trip. They could help you out.

The only thing I would add to the above is figuring on tying up at Kaskaskia Lock & Dam below Hoppie's. From there, I would recommend anchoring in the diversion canal at Cape Girardeau. From there you can make Green Turtle Bay in a day and be in an actual marina.

From there, marinas are good until you pass Bobby's on the Tenn-Tom. Not much of a marina, but it beats dropping a hook. I'll look up the mile marker guide showing recommended anchorages from "Nitty Gritty On The Tenn-Tom", and post it here. I can tell you from experience, it's not exactly accurate. It still helps though.