Congratulations! Very exciting news.
I spent 6 months in South America a few years ago and absolutely loved it. I hate to be a killjoy but I don't think it's something I'd want to do with my little man (he's 18 months old). I'd be mostly concerned about access to clean water, safe food (I had stomach troubles a lot in SA - mostly in Bolivia), altitude changes and travelling in not the safest conditions (those bus drivers are wild!) Don't underestimate how fiercely protective you're going to be of your baby. I know that I wouldn't have done 75% of the stuff we did if I had Arlo with me. And the stuff - you need so much stuff with babies. I tried to go the minimilist route but it's still unbelievable how much stuff we have - we take more for a weekend away than we used to for an eight month trip.
This all said you know yourself better than anybody else. And a lot of your success will depend on your baby. My little guy didn't sleep much at all in those first few months so the last thing I wanted to do was to leave the comfort of my home. On the other hand you never get in a bus on the Andes without sitting near or next to somebody with a baby strapped to your back so it can be done... you just need to think about how enjoyable it would be with a little baby.
I hope I don't sound too depressing but I have thought about just this a lot over the past year. I would love love love to go back to South America for a long trip but my husband and I agree it would not be fun for our son at this age and we have to put him first. When he's old enough to understand what's going on a bit more and doesn't need to have day sleeps we hope to resume our old ways..please!!
Agree that first year would be much easier than second year. Once they're running it's hard to contain them!
AND all this said I've been very lucky to have backpacked all over the world and nothing I've seen or done in the far corners of the globe comes any where near as wonderful or amazing as having my son. He is pretty much the best human being...ever!! Maybe just wait until you have your bub and then decide!!
Good luck whatever you decide - it will be an amazing ride either way.
