Not sure if everyone is aware, but most dry bags are only good for warding off rain, splashes or the occasional dunking. I recently got a drybag from watershed that is submersible. I kept the contents dry after being submerged for about 15 hours with sandbags holding it under water. They are pretty expensive from the manufacturer but I’ve been seeing some good deals on Ebay. The also have drybag with straps that can be used as packs. (One just sold on Ebay for around $50 dollars.