At the river
mogul find on the sign on ski mountain
mogul
There's no key, you have to play the mission before it, which is case of the missing puffles.
JellyBean
in a tree
Mogul
In the shelter.
in the cave
mogel
to find paper when you have a log on the fire put the survival book on it.
mogul
If you are talking about G's special mission the secret word is "mogul"