Part scientist and part photographer I see. Thanks for the Frazil Ice info and the photo above is amazing by the way. We visited Yosemite on the bike for the first time on Labor Day weekend this year...ugg! Yosemite is majestic and breathtaking----seriously, everyone should see it! Promised Half Dome that I would be back, promised myself I would never ever go back during the busy season! Your trip planning is strategically perfect, I should take notes on that.