It's not as difficult as you would think. My old Olympus, E500, was a big bulky camera but you find ways to stabilise yourself....and sometimes you just take a lot of shot. My current camera is an Olympus em1 which is a mirror-less micro 4/3 and I LOVE IT! Much smaller and easier to shot with one hand......depending on the size of your lens that is.

I think you'd love kayaking.......but then again I think everyone should love it. LOL!!! Have a great day.