I do not mind big size of raw files, i just keep controll the number of images i shoot. And that 42Mpx give me flexibility in post, i can shoot a bit wider, and still have plenty of pixels. But that is not su crucial. They just are and gives tons of details. On the oher hand i would trade back half of those pixels for double ISO performance in low light :)
And yeah, dragging that hardware with you would be quite hard lol