Good find!! I betcha Paul and Susan will be able to tell you who each and everyone of them are.

They inform me the town Kambalda is on the shore of Lake Lefroy, seach for it on google maps and you can see the lake and the tyre marks of the landyachts.
I'm thinking Paul and Susan might have to host a Seabreeze pilgrimage for us, the kite buggies and speedsail boarders

There's some nice looking class V's in there as well.