Having done a little telemark skiing (my knees are still recovering from it!

), I think I'm able to envision what you want. I get the feeling that the objectives of both protecting the gear well AND having it readily accesible contradict each other to a fair degree.
How far down your hips does the backcountry pack extend? You may find that a small Domke with the backpack straps can fit below the backcountry pack, and while not incredibly accessible, it would certainly do a pretty good job protecting your gear.
I can't think of a pack that would be suitable to serve both purposes for you. Perhaps something in a small padded fanny pack worn in front of you? I'm not sure. Below the backcountry pack would allow the backcountry pack to take the brunt of the impact if you fell on your back, was my thinking...