I really do not know if this is a fraternity visiting Disneyland, but it definitely looks like a group of college fraternity. So I am imagining the Delta Tau Chi house (from Animal House) visiting the park. First up is a shot of a couple posing in front of Mr. Toad's Wild Ride. Note the 15 adventure ticket book in his pocket.
Next up is a group standing at the main hub with the Monsanto House of the Future in the background.
The last two are my favorites. First up a group shot in Fantasyland with a striking blonde standing in the middle of the group wearing her Navy influenced outfit.
Final image is of the guys standing in Frontierland after visiting one of the hat shops found in Disneyland.