heres a full size trailer i made for behind the mountain bike... for aircrafts mostly but now i have to rig it so it hold the boats. top built out of tent poles (aluminum) and covered with coroplast. yes coroplast. the stuff planes are made from....the bottom of the trailer was made from a crate (also Light aluminum) used for pocket bikes. also on mountain bike wich is not pictured are mini phantom lights for headlights, working brake/tail light, also have signal lights all around. the same as trailer. will post pics of both when nicer out. too much snow here to move the trailer.