YOU DID IT!
135 is the combination to the lock.
You have solved the Search & Rescue Quest, the treasure is yours!

A Nugget of Never Knew

You almost certainly experienced some failure during this game, but you persevered! Walt experienced failure as well, but you’re standing in the fruits of his perseverance as you read this. A testament to this is memorialized in The Red Trolley Cars along Buena Vista Street. They both have special numbers. One of those numbers is 623. The 23 in 623 refers to the year that Walt’s studio in Kansas City went bankrupt and when he decided to try his luck in Hollywood. The 600 in 623 refers to the historic model number of the trolley car used in Hollywood when he arrived. If Walt doesn’t fail, there probably would have been no Disney California Adventure!