Well, Jim, you might want to check some of the links on that page.
I'm having a problem with the Lake Havasu Flyers (http://www.geocities.com/amahsf/)
They may be what is now the Desert Hawks Radio Control Club which can be found at http://www.deserthawksrc.org/
They are the ones that put on the Annual London Bridge Seaplane Classic each year in November.
I didn't check all of the links. Just the ones that are important to me. Thanks for putting up the page.