I'm jealous. The Mississippi is one of the rides I hope to do before I croak. The other two are the Pacific Coast Highway and the Blue Ridge Parkway. I can't break free or I'd offer my writing abilities. Good luck!
Bill or Clyde (actually it's the name I gave to an old Honda that I spray painted green) works. We're still going around the big lake in mid June but let me know your tentative schedule.