>Disneyland Dream (1956)
http://www.archive.org/flow/flowplayer.commercial-3.2.1.swf

In July 1956, the five-member Barstow family of Wethersfield, Connecticut, won a free trip to newly-opened Disneyland in Anaheim, California, in a nationwide contest. This 30-minute amateur documentary film tells the fabulous story of their fun-filled, dream-come-true, family travel adventure, filmed on the scene at Walt Disney’s “Magic Kingdom” by Robbins Barstow.

In December 2008, “Disneyland Dream” was named to the National Film Registry by the Librarian of Congress.

Note: The first uncredited screen appearance by Steve Martin occurs in the film at around the 20:20 mark – very brief, in the lower right corner. He is the 11 year old in pink shirt, black vest and top hat, hawking guidebooks.

Found at the Internet Archive.

Robbins Barstow, the creator of (and the dad in) the film died in November of this year. His obit is here.