making GPG portable

[Stephan Siering]

Hi Group !

As new user in GPG I have a question on portability with GPG.

When using GPG on a workstation, it's easy to secure a file containing my
passwords, keys, pin's and so on.

But what, when I am not at home ?

I want to store all needed files on an USB device to en- and decrypt secret
files.
So I made a configuration which works on an USB devive without installing
anything
on the Windows engine.

Here my question:

Is it a good idea to do this ?
If the USB device is lost, only the pass-phrase secures the crypted file.
Is the risk too high, or will this secure enough ?

Has anybody a better idea for that usage ?

Thank you

Stephan