Vankiwi - that sounds wonderful! It will definitely be nice to be back home though.
Vrogers - everyone is different and some people have more trouble than others, but I wouldn't worry terribly about losing the weight after the baby. I gained quite a bit with my dd, but still lost it all in 2 months without watching what I ate or exercising. In fact, with BFing, I could eat like a total pig and still lose weight! Haha. I know not everyone has that experience, but I wouldn't overly fret now about losing it, even if you're unable to stay very active during the pregnancy.