I do think the ski pants could be too warm, but too tight? They're actually baggier than most pants I have. For the baselayer, they are very stretchy and far from restrictive, so the constriction is the only issue.

Never thought of mucklucks, sounds like a good idea!

I will be walking. There is potential for deep snow, and overshoes or gaiters were recommended. I was thinking snow would just push up under gaiters. Overshoes have the benefit of additional warmth, but traction suffers and adds weight to the feet.