So just curious, but what do other people do with your wallets, backpacks etc when you go swimming at a cenote or beach that is not a resort? I am mostly interested in Yal-ku Lagoon, Akumal Beach and Gran Cenote but also interested in general tips. I think Yal-ku might have lockers but what about places that don't? Is my backpack safe while we snorkel? We're planning on taking the collectivo for most outings so we won't have the trunk of a car or tour bus or anything like that.