[@Lucidnonsense] It's cool to have that goal, but that longterm goal is gonna be looooooooongterm goal. The people of the crater have gone almost backwards in technology, I'd imagine rocketry would be at a 1950s level at this point. Also the people of the crater are very much anti-nuclear energy because they don't want the vacuum-kaiju showing up on Bastion.

I like your idea of the curiosity to hear what's going on, check to see if they're truly the last humans in the galaxy or something. But as a heads up, you'll have to do it without any form of nuclear energy, or else risk the collective antagonism of the entire crater.