Lildude,
Just relocate your family reunion to the Koi Show site (Johnson Hall, Placer County Fairgrounds).
There will be food for sale to the public and Cocoa-cola will have a display there selling drinks...so no one in your family has to cook.
The Fairgrounds also has a play area for fun and games... If you're lucky the stock car race will be going on later in the evening..so other entertainment might be available...
Besides what better way to have a family reunion than to combine it with one's love of Koi, one's Koi Friends/family and one's family..