Take a Theracell or two. Skeeeeters.
Yep, GPS, bug spray, boat paddle to beat the cotton mouths off the boat and wouldn't hurt to take a flare or two. Make sure your cell is charged up and you know exactly where you are in case you call 911. Up the river there are street signs to help you know where you are. Have a good time and stay hydrated. It gets really hot amongst the Cypress.