I winter bash with a 1/16 Slash. Doesn't really handle fresh powder due to it's ridiculously low ground clearance but it's a blast to tear around on snow covered roads.
The best part is once the batteries are taken out I just wash it under hot running water for a few minutes to get all the gunk off. Then I blow most of the water off with an air compressor and apply a little oil to stop rusting.
I used automotive heatshrink on the battery/esc/servo wires because it has a layer of some sort of silicone inside it to stop water from penetrating up into the conductors.
Truck is still going strong with no signs of corrosion or water damage. For this reason I strongly recommend a Traxxas for the snow. It requires a few changes but once you're done it's easy to keep it up.
I also tried my hand at waterproofing my Blitz to run in winter as well but it is harder to maintain and some stuff on it seems to rust regardless of what I do to protect it.
Just my thoughts.
Star