If the data is so important that you would die for it, then hardware protection is the way to go. Period.
TrueCrypt is only effective as long as your data, your password and / or yourself are out of reach of whatever sociopaths are seeking the data. TrueCrypt has not yet been broken (as far as anyone knows) so possession of the drive alone is insufficient. Once they have the drive and yourself or your password, then the scenarios proposed in this thread apply and you're "done". As I mentioned before, the destruct command or "panic button" I proposed only works if you are still in possession of your drive and are about to be captured. The plus side of my idea is that you cannot have the password tortured out of you and no matter how weak your password may have been, since the header is destroyed and the data is corrupted, nobody is going to get that data. Ever.
Bargaining chips only apply in civilized societies, where life is valued. Since there aren't any of those, prepare to be beaten until you give it up. Quite frankly, I'm surprised that Edward Snowden hasn't had the tar beaten out of him to give up whatever additional information he may have. Putin must see some value in keeping him alive and "unspoiled" - perhaps Russia already has access to Mr. Snowden's information but having Mr. Snowden release the information gives it credibility.