The headquarters hotel will be the Marriott Biscayne Bay, 1633 N Bayshore Dr, Miami, FL 33132, (305) 374-3900.  There are rooms available, but no longer at the discounted rate, at the link below.  
https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fMarriott.com&c=E,1,inK2SISHjGuujNiq6fmZXFqApS6DUJ3y1IXVZxFiHrnTBXju7mt3G1oEallWNyPq8EsU5kAaDE2udXh23Ukz3szuRfweQ-FZtenPr9_7A1VoDZBswxLgZel92R_y&typo=1   

Pool training availability

                Tuesday, April 30       5 to 7pm
                Wednesday, May 1     8-10am & 5-6pm
                Thursday, May 2        8-10am & 5-7pm
                Friday, May 3              10-12pm & 4-6pm
                Saturday, May 4         10-2pm
                Sunday, May 5            8:30-10:30am

Open Water training will be available at the event site on the days prior to the event, however it will not be a closed course as it is a public waterway until Friday, May 3rd. This will be supervised by Marine Patrol.

Open Water training availability

                Wednesday, May 1       1 to 3pm
                Thursday, May 2          1 to 3pm