sort out where your moving first then find out what is going on where your moving. deciding where to live based on airsoft is just silly (I know you are just gathering "intel" but still) . airsoft is alive and well in both places and both have different rules, locations, member count, ect ect.
my 2cents on that
but I say southern BC for the weather if you want snow it's only a short drive away and not in your driveway.