I bring along a mirror-less camera with interchangeable lenses (I bring a flat prime and one medium prime). I've got card readers and adaptors so that I can get the RAWs onto my smartphone, and from there I can edit them as much as I need to on the go. It's certainly not as precise as a desktop with mouse, but it beats lugging around a laptop just for this one thing, and inevitably all the time I'll waste dicking around on the internet. Plus, I only need those instant edits for instagram or flexing for family and friends, so the hardcore fine-art edits can wait till I'm stationary.
If you're trainhopping I'd recomend a simple
Lowpro padded puch thingey like this or similar. Brand really doesn't matter, you just need the tiniest bit of padding. Put it in the middle of your pack, maybe surround it by clothes or something and it'll be golden.
If you're just hitchhiking you're probably fine to skip the bag for protection's purposes, though I still have one to keep all my little doo-dads together like extra cards and batteries and chargers for my camera and phone, though the camera itself just floats near the top of my bag.
Yeah they're 'delicate', but they're also made of metal. Good cameras can actually take quite a beating, so long as something hard doesn't hit any glass head on.