Bring a couple of XL t-shirts to put over the back of your loungers. You won't have any confusion about which one is yours. You can then use the resort towels. (Towels in your luggage take up way too much room.).....Just a suggestion that worked well for us on our last trip.
After starting to use the T shirts never had a problem with some one accidentally taking you towel you can get some funky t shirts done up, lol towels are picked up at 6am every morning off of loungers