Great question and a concern for many who travel or even shop in town anywhere. We dive and found that there are a number of 'dry' boxes and bags you can buy and use. Dry bags are less costly, but get a hole in the bag and your items get wet. There are small dry boxes that you can hang around your neck or tether to your wrist. As far as getting a small safe for your chair, visit www.vacationvaults.com and get that device. We travel everywhere with that and I have one in my vehicle, travel trailer, and at our timeshare in SXM. They really work. Use a bit of WD-40 on the lock if you take it to the beach because sand will get in and potentially cause the tumblers to get stuck. Ask security at O'Club...we had to literally use a hacksaw (took over 1/2 hour) to cut that strap to get it off the chair when our tumblers 'froze' due to several years of use on the beach. Dry boxes and bags and the Vacation Vault work...we travel a lot and now have piece of mind. The Vault cost about $30....order on line...company is in Miami so it's quick shipping.

Have fun! Hope this helps!