How much weight did you lose on the trip? Did you also lose weight from the training? [This sounds amazing. I bet you got a lot of Forrest Gump jokes, though.]
I actually gained weight, surprisingly. I'm 5'3" and weighed in somewhere around 106 or 107 pounds before the trip, and now I weigh 109.5. (Just enough to finally donate blood, I hope.) The other women on the trip kept a pretty constant weight, though I think I am the only one who actually gained weight. One guy started out around 260 pounds and lost at least 16.
I didn't lose any weight from training, probably because I didn't train enough.