Any advice on white water supping down rivers? We're looking to paddle the Collie River from Wellington Dam and would love to hear from any one that has already tried it. We're looking at taking some inflatable 12'6'boards down, would these be too big? Is inflate pressure a factor? Is it going to hurt? Is it advisable to take a dispensable paddle?

I've watched footage of Kai Lenny do it and I imagine we would be similar except possibly for any of actually standing up.