I know this thread is OLD, lol, but just wanted to add some input just in case. 80% of your guests MUST stay at the same resort.
Examples:
You get married at Riu Palace Mexico (RPM), 80% of guests must stay at RPM.
or
You get married at Riu Yucatan, 80% of guests must stay at Riu Yucatan. They can't stay at RPM, even though it costs more.
Hope this helps someone! Oh, we've stayed at several Rius, and never had a problem with "smelly" rooms. Always a good time!