Elvis Presley personally quoted that Clambake (1967) was the least liked movie, that he acted in and his all-time favorite was 9 years earlier, in 1958's King Creole (1958).
One of the children at the playground during the song "Confidence", the girl afraid to slide down the chute, is Lisa Slagle. She became a member of the Joffrey Ballet
Although this film was set in Miami, Florida, Elvis Presley's scenes were all shot in and around Los Angeles, California. All the Florida exteriors were shot in wide angles, using doubles and look-alike impersonators for Presley.
In the closeups the carburetors on the "Rawhide" boat have vertical velocity stacks, while during the race, in the long shots, the carbs have horizontal scoops angled off to the side.
The small sailboat in the boat shop has a registration of CF 0258 ML
which is a California registration number. Florida has had a 30-day registration period for boats from out-of-state for many years and Florida vessels have an FL identifier.