My sister's family (the other side) owns a beachfront condo in OC, MD. No POOL there either - 5 story building. It looks just like a TS condo up the street and I regularly advertise HER full share condo for rent on Redweek using that TS condo site.
There is a week (or 2) in late JUNE when MANY families do NOT like going to OC, MD as it is call HS graduation (Seniors) week .... I think your week is too early for that. My sister gets regular inquiries for THOSE WEEKs - her family or her sister-in-law personally USE those beach weeks. A unit gets trashed that week trashes most of the summer rental season. Unbelievable number of parents are just CLUELESS as to what "their" children & friends will do... she gets MORE calls to rent for those 2 weeks than for the rest of the entire summer combined.