I agree that the MLU's are inferior to PLBs. But I do believe PLBs should be required in the winter months. The fact is that SAR success this time of year is too low. So (a) rig the mountain with trail cams and sensors, (b) Cut access roads and/or build a tram to the top of the mountain, (c) disband SAR after December 1st as they aren't going to save a life anyway, or (d) require PLBs so that SAR/Air Guard can focus on a known location.