Ok, I have the first river trips under my belt we did a class III run on the Kern River in California. It was the most water that river has seen in 5 years or so. We did 2 runs on the same section. First with the oars on the back and two paddlers and two passengers sitting in the center. The second we paddled.
The run with the oars went smoothly and I did not need any help from the paddlers. The boat tracked and punched holes well. I had no problem turning or setting up for a drop. I don't have any experience guiding a paddle raft so my buddy Gary guided and I paddled front left. With only two thwarts the middle paddlers moved up to brace with the front thwart. I did notice some water on the floor but we were in big waves and all wet anyway. This is also when I decided a third thwart would be necessary for paddling. I also noticed that I kept getting my foot wedged tightly between the floor insert and the tube. Too tight, I will also be adding foot cuffs for paddling. I worry about a foot getting stuck and wasting someone's knee or becoming entrapped during a flip if the don't have a better spot to put their feet. I don't see someone's foot sliding in there and causing a problem but if the try to brace their foot there in will end up wedged in. It took a little effort to pull my foot out after each rapid as I tried to find better foot placement.
At the end of the day I bought a raft I could afford and had a blast using it.