[Yooperforeman]

Looks like you had a great time,nice pictures.Is it the foot shift lever that won't move?I would remove that black plastic cover around the foot shifter and see if snow/ice got packed in there.Maybe it got packed up in the engine skid and froze up so that the shifter won't move.
Those pictures look a lot like the area where i ride by my dad's house.Cedar swamp and marshy areas.What a good time!