This is a learning experience. Pretend that you are doing this expedition on your own. What will you need? How will you keep things dry? How can you increase your comfort?
Your own pop, snacks. Leave pop in original boxes. Loose pop cans in a duffel will chaff and leak.
100 feet of rope to cut up into smaller pieces for tie down of gear, of a diameter that is easy to handle, especially when tieing and untieing knots.
50 feet of 1/2 inch rope for mooring and emergency
Chairs
One good leakproof 5 gallon water container
Water purifier
Minimum recommended number of straps: 4 (3-4 ft), 6 (6 ft), 2 (9 ft), 2 (12 ft). You could bring along twice this many and use them all. They can be bought at nrsweb.com for about $60. We can buy buckles for $2 and 1 inch strapping for 80 cents a yard.
Ammo cans, both small and large, or any other type of dry box.
Tools of any sort, especially large screwdriver, wire, duct tape etc.
Extra dry bags
Duffel bags
Sun shower