I am currently rereading Blondie Hasler's biography. When he was involved in planning for irregular force raids in SE Asia they had a problem going ashore in very muddy areas, even worse than the East Coast. The book gives a full description of the sled that Blondie copie from the Chinese and the way that it was powered by something similar to ping pong paddles. I went searching for mud sleds and found lots of pictures but none powered by ping pong paddles. A person I know has mud boots that he uses to access his dinghy at low tide on the Medway so that he can get out to his boat. I was thinking how much more useful a sled might be on teh East Coast.