"Rule of thumb is if you can see the next tree or the next powerpole you keep going, otherwise you sit and wait in a hover"
Increase that to about 6 poles you might be nearer the mark. And I would be on the ground, not hovering.
Scotto, if you're not in precipitation, you won't get icing, and the time to start looking out is when you have to turn the anti-icing on, which is 4 degrees or so in the 206. I seem to remember something about the 206 (in UK anyway) not being able to fly in snow anyway, but I may be wrong.
As malabo says, you may need baffles or deflectors, or even snow kits to protect the engine, depending on the machine, but dry powdery snow is otherwise not a problem for the airframe, until it starts to restrict your vis.
Wet, clingy snow won't get off the windcscreen and won't blow off in flight (downwash in the hover is best) so don't even try. Get yer backside on the ground with a coffee in your hand at the nearest hostelry first!
Phil