Hmm, if you're backpacking, you could to do some squats with your backpack on your back. Haha. Maybe not.
I dunno, if it were me, I'd probably come up with a circuit of bodyweight exercises to do in the mornings, and rely on the fact that I'd be walking a lot (that's Europe for you). Then I'd jump back in with Stage 2 when I got back.
Just be careful - the chocolate is way better over there...that was always my downfall.
