for the dragging, check the slider plastic and all the idler wheel bearings.
the way it is idling sounds like plugged/dirty pilots. good carb cleaning should clear that up.
i would suggest a 12 or 13mm swaybar from pioneer to help with the ski lift problem.
for the deep snow, we need to know exactly what your problem is to point you in the right direction.
i would start with the carb cleaning 1st and check the sliders.