Wonderful! Milo, you are fortunate.
i will defer to the other members about which one to attend. Moose camp would be my first recommendation. There is also the Univerity of Wisconsin's at Lacrosse. There are others. These are the two most common.
You might also want to do some research on a clown by the name of Bluey Brattle. I believe that he operates out of Blackpool. At one time he was the european director of the world clown association.
WELCOME TO WORLD CLOWN ASSOCIATION
Clowns of America International
Both can get you where you want to. Contact their appropriate directors.