Beautiful! And thanks for telling me about the log encounter – I think that’s the first one I’ve heard about, so it’s good to know. Did it damage the seat, too?
One option to patch and reinforce the floor under the seat is to use some of the scrap floor or tube fabric (or inflation bag fabric). It wouldn’t be pretty though. If you use the tube fabric then I would spread a thin layer of Seam Grip+WP over it to protect from abrasion and prevent it from soaking up water. Cheers!