I am just curious if you have thought through your end use. I gather from the bits and pieces you have posted that you want skier blur in the shots. What is your target shutter speed? Yet at the same time you are talking about bright light. At the same time you are worried about perfect sharpness. By the time you have a slow shutter speed (1/30th or even smaller) you will be looking at f20 which on a small sensor throws you well into diffraction. Small sensors with reasonable pixel density will be into diffraction at or before f8. This means whatever you are looking at must be capable of accepting a neutral density filter. Big thing for you to keep in mind, does the lens have a usable filter thread and is it a common size?
Skiing with a tripod is not a difficult maneuver. I skied with an aluminum series 4 from Gitzo, of course I find the best light is low light, once the sun is up for more than an hour it gets very harsh particularly with the reflections from snow and glaciers... Look at the carbon series 0 or 00 from Gitzo paired with the smallest ballhead from really right stuff. Or you also have the option of having a machine shop put a thread on the end of your ski pole to use as a monopod.
I use bags from F-Stop for backcountry skiing and mountaineering. Very customizable based on the gear you are carrying, usually medium format. But then again, I don't go for rapid access. I set up with the landscape I want then have subjects move through it... But check out what they have to offer, haven't really looked at their selection in the last couple years and never really at their small line up.
If you are looking at stitching panos, remember that you have to capture the landscape before the skier moves through it leaving tracks. At the same time your lens has to be wide enough to capture the entire spray and fine cloud from the skis. A camera with a manual setting is a massive asset so that all your images for the stitch have the same exposure. And manual focus makes sure the DOF lines up perfectly.
On a similar note with the shutter speeds and cameras you are looking at you might find a wider lens to be better. You won't have a burst option like high end dslrs, so it will take skill, you have one shot to get the subject exactly where you want it in the frame. A wider lens will make it much easier. You don't have to have frame filling shots, wide shots capturing the landscape and romance of the serenity are often much better compositions.
Basically my thought for you from what limited info I see boils down to this if you are choosing a smaller sensor camera:
Lens easily accepting neutral density filters to avoid diffraction (onsetting around f5.6 to 8 depending on pixel size)
Think wider rather than telephoto
Highly consider at least converting an old ski pole to use as a monopod and perhaps a tripod
Have a look at F-Stop camera bags, might have something you like but might not...
Anyways just a few thoughts for you which might be helpful for choosing a camera and lens.