If the snow is deep, fresh powder I find floats to be the way to go. Skis just can't support the weight and the model sinks before it can get enough airspeed to take off. If you do manage to take off the landing is usually a big spray of snow and a long trudge through the powder to retrieve it. Todays snow was compacted and pretty firm so the skis worked well. The tailwheel drags a little but once it lifts it's no problem. The plane would take off quite easily today and with a good flair to keep the ski tips up would land nicely. The floats worked well today too. If the snow has crusted over then skis really are prefered as the hard, icy surface can damage some floats. The big thing is to avoid deep foot print holes as they can swallow a plane pretty quick! Nothing like a take charge turned cartwheel because of a ski or float falling into a boot hole!

I've got snow flying videos on YouTube. http://www.youtube.com/watch?v=J4OJUm2h4vE

Jaybird.