Too Obscure Even for Google

Not TG-related (AFAIK), but I figured I'd take the chance that one of my American boom-generation contemporaries might recall the answer to this one.

Disney's version of Davy Crockett had a catchphrase, "be sure you're right, and then go ahead". (The real David Crockett said almost the same thing -- "Always be sure you're right -- then go ahead" -- but the meter didn't lend itself quite as well to being sung. If you use the link, feel free to sign off after the first chorus.)

Anyway, it suddenly came into my mind a couple of nights ago that someone -- not sure whether it was a television show, a book or a film -- made the phrase the key to (I think) an important treasure hunt scene: "right, and then go ahead". I think it was a teenage girl who came up with the clue. Anyone have an idea who or where?

Eric