In reply to nickinscottishmountains:
The Olympus TG6 is the best option for a Tough camera and will survive most things thrown at it. Small enough to clip on the outside of a rucksack, but would invest in at least one spare battery. As well as jpegs it also takes RAW images (ORF's) which give you a larger file size and more chance of post editing the image.
Image quality is good even in low light, especially if you know how to week a few of the settings, but I prefer the quality on my Canon PowerShot G7 X Mark III. Costs about £100 more than the TG6, but also pretty compact so can be clipped onto the outside of a rucksack. It is not a Tough camera so the lens does come out of the camera body, so not as weather proof, but have used it in some pretty extreme conditions at work on an oil rig offshore.
For rugged and robust you can't go too far wrong with a TG6, enjoy your trip.