went to the booking site and moved some dates around.
does look like your dates are not available.
or maybe on hold with a convention...
i put in dates starting with May 21/Sunday and openings are available starting then.
keep trying as rooms get cancelled frequentily and maybe your dates will show up later.
when i first tried to book a king suite at rpr for october to mid month, it was showing as not available for king suite.
found out there were a hold on those rooms due to a convention .
did book the standard room but found out last month the convention was cancelled.
i called and modified my reservation to the king suite
that is why i say keep checking in case rooms do become open for your dates.