Holiday should have room for you, outside the marina breakwall if nothing else. Rayland is a good stop. A little tight getting around in their basin, but they do have fuel, and it's a good off channel stop for the night.
Prima Marina has fuel.
Marietta Harbor marina is on the LDB of the Muskingum river, very near the confluence of the Ohio. It's within walking distance of downtown. There is fuel there, and also fuel at the Marietta Boat Club, which is (give or take) a mile up the Muskingum on the LDB.
If you can, take some bicycles to cruise around Marietta, it's a great town for sightseeing. Have a great trip, and look us up when you hit the Beaver!
M/V The 69 Queen
1969 River Queen 40'
and a 24' Pontoon "Red Solo Cup"
Port of Fulton, MS