I talked to the reservation office for Taidnapam on Saturday. They said that the main campground is the only one that's open for the weekend of the tournament and they are not taking reservations for spots after the 15th of September. So it's first come first serve there. So if you want to fish the tournament and you want to stay there, there is no way to use the website to do it. Just show up and talk to the camp host or follow the instructions to pay for your spot if there is one available.