tire size is the main thing, then wheel speed, then weight
snow is tough for an rc because to scale, you'd have your house buried
fresh powder is the problem
anything below a 2.2 will not go far in more than a dusting
2.2's are good for a few inches
maxx rims are good for a 1/3 to a 1/2 the total tire height, 3-4"
clod tires are wide and can actually float on powder with proper wheel speed and weight distribution
a general rule is 1/3 to a 1/2 the tire diameter and you're safe, but there are other factors. sometimes the surface will melt the re freeze making it harder and you can drive on top, just watch for soft spots and holes. again some wider tires like clod, kong, monster pirate, USA1, and jumbo maxx might float on powder with a good speed and low weight. plow piles are great as long as they're some what compacted, the harder surface works well
watch out for salt/sand in motors, this will destroy the motors quick. maintenance after each run is a must and vet wrap on the end bell helps.
I actually had a ESC that gave up in extreme cold, WHIMP (it was a super rooster in a sealed box). it came back once it warmed up, i think it was a fault in the thermal protection that novak didnt think anyone would find, northern michigan easter egg.
oh and a high lift on ALL-T's isnt bad either. but you do loose some scale factor and center of gravity...
my suggestion is a clod or maybe a txt