On the afternoon of March 26th, 1975 a fire occurred at the show building for Knott's Bear-y Tales. Estimated damage - upwards of $3 million and water damage to the Palm's Casino and Buffalo Nickel Arcade below. The fire was said to have been started by an arson related incident and to this day the Arsonist(s) were never caught. Rolly Crump did suspect it had something to do with a Union dispute since Fantasy Fair, who worked with Crump, were part of a Non-union.
When the fire occurred, scenes said to be completed were both the Factory and the Frog Forest scenes. And of these it was reported that the set pieces, rock work, and trees had been installed. Thankfully no animatronics had been installed yet. The ride's proposal date for opening was June as part of the Roaring 20s area but due to the fire, the ride was delayed much further until 4th of July weekend.
Growing up in Los Angeles in the 70s/80s we visited Disneyland on a regular basis and often after school, before "Annual Passes".