Yeah I'm about to setup a darkroom in my bathroom. I already develop myself but I want to get into printing. Doing that on the go during an Antarctica exploration seems like a pain in the ass though.
It's simpler with slides because you skip the print process, but developing slide isn't nearly as easy as b&w. It's 10+ steps process [0] and temp is critical vs 3 steps for b&w. You can also make slides from b&w film if you're adventurous: https://www.bhphotovideo.com/explora/photography/tips-and-so...
Facility for developing Black and White photos is not very complicated. Usually you just need an enlarger, some chemical tanks and a room with no light. If you want to do slides (rather than prints), and use the right film, it's even simpler as you just need to develop the film.