Took my maxx out in the snow, and it fared excellent. It was about -16c so my hands were a little cold, and every time I got stuck in a huge snowbank the truck would steam a bunch, but I'd run over and haul it out, drop it on the ground, and send er on her way. As soon as I was finished outside, I took the truck into the garage and used canned air where all the snow had built up, then just let the rest dry. I have shock covers, but nothing is waterproofed, and as long as the snow was still frozen when I blew it off the truck, everything is fine, and nothing is really wet. My buddy has had his T-Maxx for years and runs it in the snow, rain, dirt, mud, puddles, and he has no waterproofing either, and he has not had to replace electronics. I'll call him lucky though, as I want to baloon some electronics, but I'll do it when I get around to it... I say snow is less of a risk than rain if your truck is cold anyway.
Happy Snow Maxxing