@DogsneedpIeasuretoo There is a small risk that the volume would be corrupted - particularly if it was doing some writing to the volume at the moment of power failure. Generally, TrueCrypt volumes are pretty hardy, and no harm if a dismount is not done.
Make sure the container file doesn't stand out by naming it something totally innocuous, and keeping the size low (by today's standards). It will take forensic analysis to check and see that the data in the file is totally random (which isn't normally likely) and determine there is an encr...
If you have the entire flash drive encrypted as a volume, then no. You must have truecrypt installed first. If you are just opening a truecrypt container (say a 2GB file) on a 4GB flash drive, then yes. You can open the container if you also have the truecrypt executable files on the flash drive ...
@DogsneedpIeasuretoo There is a small risk that the volume would be corrupted - particularly if it was doing some writing to the volume at the moment of power failure. Generally, TrueCrypt volumes are pretty hardy, and no harm if a dismount is not done.