I am thinking of buying the new Pioneer 500, but have a question about the 4 wheel drive system. I understand that you cannot lock in 4 wheel drive. I intend to use it for snowplowing, deer hunting, and work around the yard. If not able to lock in the 4 wheel drive, would that make it a bad choice for snowplowing? I live in northern MN, with lots of snow. Would it not go thru snow well? Does it essentially become 3 wheel drive? How does the system work?