Thanks for all the great replies guys. I will be climbing with a guide service again,(still a novice) and was just curious. I can now see why all of the climbs in July book first. lol My main concern is still returning safely, but would love to summit Rainier on this, my second attempt. At least I chose a time when the moon will be full. Don't know how many other's have planned a climb around the phases of the moon. Thanks again, This is a great site and as I'm new to climbing and moutaineering, I have been soaking up all the great replies on here. Cheers.