I love fishing with my tracked ATV. However, if you get them stuck in the slush, you are in a heap of big trouble. I wish I could find a photo, can't seem to find one at the moment.
When I started to look for a tracked ATV, I talked with a few folks that had them. Everyone said to get 800 cc as a minimum & I agree. I have a friend that owns a Honda with 700 cc's and he does seem to bog down more than I do. As I mentioned in the thread above, I can travel through 6-inches of slush with no problem. Any more than that, and I will turn around.
The Can Am's have adjustable power steering to use with the tracks and a chip that adjusts your speedometer & odometer accordingly. You won't travel as fast as a sled; however, I go as fast as I want. Any faster & it will be too cold for me. I highly recommend the Can Am.
In addition, I've towed a few sleds off the ice, never towed a tracked ATV.
My wife calls me the "Obsessive Compulsive Fisherman" (OCF)