Thanks for the responses guys. I was thinking the best bet would probably be to take a sub (I got a clean friend so I won't have to use synthetic, even though its worked in the past for me) but prepare for dilution just in case, and you guys confirmed what I was thinking. My only worry would be having them find my sub which would be an automatic fail, so I was a little iffy about it. However, that rigged-up underwear idea sounds pretty solid. I was thinking about stuffing it in my sock or something, but your idea seems better. Can you go into a little more detail about how you put it together, or perhaps a suggestion on improving it? My only worry would be having it detected during the physical process, although I guess temp could also be a concern.

In any case, I'll post back when she's all said and done.