Not saying this will work for you. But almost all the canoers and kaykers are using this method/ design. 2' heavy chain drill hole in the front and rear of canoe or kayak drill a hole for screw with pulley and they are using a dog leash auto re-track and lock in place. You will be able to drop the chain anchor but you have to pull up the rope by hand. On the chain you put the chain in a bike tube and use wire pull ties and couplers and keep a sharp knife handy in case of emergency.
Pull-Up Strap Handle Kit
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