Mark, I don't even remember what snow looks like, but I'm no stranger to being very active with a camera. I'm also a pretty big believer in the KIS genre(yes, w/o the being stupid part!!).
I'm not into fancy crap either, etc.
Here's what I do when I'm bobbing hills on my Mtn bike and with my camera hanging from my neck.
I shorten the strap so it's at the chest. I also always have on a pack when I'm out shooting, either a camera pack or a Camelbak if I've got just the camera. Either way, any pack I own has a chest strap. So I simply snap the chest strap over the camera straps and it holds the camera very securely in place. The closer the camera is to the chest strap, the more secure and less sway.
Sometimes when shooting a cycling event, I also do that with my 200mm 1.8. And that lens is big!!!
To shoot, simply stop, unbuckle the chest strap and shoot, then simply re-snap and your on your way again.
And yes, I just use stock cameras straps. My cameras have the freebies sent out by CPS which have the wider foamy/stretchy neck part, otherwise I have used to OEN stockers a lot.
Anyway, it's always worked for me.
If you need to protect the camera from the elements, simply put a small, draw corded stuff sack around it!!
But then again, I don't need no steenkeen bogdes either!! :lol:
SS