I used ATV's for years and got tired of getting stuck (when the snow was as high as the belly pan). So I sold them and bought a snowmobile only to find they get stuck too. They each have there pros and cons.
The snowmobile is faster, less messy(not as much slush flying in the air) and better for pressure cracks.
The ATV is better for road travel if no parking by lake, easier to transport equipment (no sleigh to pull, just build a box) and when you do get stuck you have a winch to pull you out if needed (you'd have to auger a hole and drop a bar down but that's another subject)
If I had to do it again I'd probably buy a ATV
