When we've stayed at the YC or BC, we usually have several items we just leave at our chairs. Hats, shirts, mugs, pool shoes, we just put our key in my fanny pack or a bag, and put in on the chair under the towels, with all the other stuff. We have never had a problem with any of it being taken. I know it may not be the best, but we do what we have to do.
Erika