I know from my own experience how much gear is required for camping in mountainous locations, especially in winter, and presumably, like myself, you carry that camping gear in a rucksack. Does the amount of camping gear you carry limit the amount of camera gear you can carry and where do you carry/stow that camera gear?
I've always bought camera gear that I felt would give an acceptable weight for camping. My tripod,camera,wideangle and telephoto come in at 5kg total. I store them in the main compartment of the bag. If I am weight concious I store the lenses in spare socks and the camera in a modified hat with a drawstring! Total weight of my rucksack is usually around 18-19kg for overnighters in winter.