Not trying to advertise or anything But I wrote a post on photography on my blog. It's called Mastering The Lens: Bikepacking Photography.. Check it out here if you'd like... Bikepacking Photography - Mastering The Lens

Besides that. I recommend the Ricoh GR. Depending on your budget. It's small, light and a work horse. You can stuff it in your jersey pocket, MTB shorts or frame bag or even around your neck. The new GRII has the wifi addition which is also nice.This is one I'm going to pick up soon. Hope this helps.