I doubt you will find towels for rent.
If you are looking for a more portable beach towel then maybe consider a pack towel. There are a bunch of brands out there but you can find them for [under $15](https://www.amazon.com/Wise-Owl-Outfitters-Camping-Microfiber/dp/B0892THXMR/
We bought Ziggy Shade
We use a 8ft SportsBrella (https://www.amazon.com/Sport-Brella-Portable-All-Weather-Umbrella-Turquoise/dp/B075485WQ7/) with with four of these stakes on windy days. https://www.harborfreight.com/18-inch-pet-stake-95489.html
This is our go-to!!
Vamqor Beach Canopy Portable Beach Shade Tent UPF 50 Plus UV Protection,Outdoor Beach Shelter for Camping Fishing Sports Event Backyard Fun and Outdoors https://www.amazon.com/dp/B093QJHPSW/ref=cm_sw_r_apan_glt_i_XWMMAN2YBCHAP7FZM198?_encoding=UTF8&psc=1