Winter and snow does have some advantages though. When I used to be heavily into RC aircraft we would remove the wheels from our planes and put ski's on them. Found alot more calm days in the winter to summer. Also if you dorked or crashed the deep snow would lessen the impact and sometimes only minor damage was done if any at all. I used to fly my gs powered heli in the winter the cold does affect the batteries for the receivers so same would apply to electric heli's but if you crashed in the soft snow damage would or could be minimal. But also remember plastic does become very brittle there is that risk too. As for landing gear you could get small tube balloons blow them up to the size you want then "duct tape" them to the skids they would look like floats