Can any IT experts help me on this one please?

I am now carrrying a USB drive as part of my EDC. My plan is to have important documents on it, passport, birth certificate, etc.
Obviously I want to have this protected through some kind of encryption password.
I have tried a program called TrueCrypt which seems good but I cannot work out how to use on the flash drive

I have a Kingston Data Traveller II as well; it has great application on it. Basically I create a 'privacy zone' and password protect it. So I can have regular stuff on it as well as protected stuff. Something like that would be ideal

Any help will be appreciated or recommendations of safe applications to use
