Yep-
I put together a scavenger hunt with a "find the code and break the code" espionage theme. It had about 15 clues which ran him all over the place with the last clue waiting at the table where we had dinner reservations. It read...."order a martini, shaken not stirred.....ask the waiter for the green menu...." The green menu (actually a 3 ring binder I compiled) revealed the code which was 3566...the next page was our cruise reservation with cabin (you guessed it) 3566. And the rest of the binder contained copies of the deck plans, cruise reviews, etc.
You just have to keep things interesting, now don't you?