The most fun is when you have a frozen layer over the snow. What I mean is you have a thin sheet of ice over a coating of packed. It isn't enough to support a person, but an R/C will have no problem gliding over top.

This is especially good when you have a wide open area that nobody has walked on. I don't know if you get these conditions that far north. It usually takes a some light rain and/or some higher temps. over a period of a couple days after the snow, so the top layer melts and then re-freezes overnight.