If I were going traveling not sure whether I would take 2 bodies or not. For lenses... 10-24 is a must for me. I'd leave the 50-140 home (too heavy though such a pleasure to shoot with)... maybe I would take the 55-200 for reach... and I would for sure take couple primes. 16 or 23 and 56. It would be hard to leave the 23 1.4 home, but I think I'd pick the 16 because it can focus really close.
So the 10-24, 16, 56 and 55-200... or instead of the 55-200, a point and shoot that had some telephoto reach...