Lesper,
I am doing the same trip, leaving the 15th. I too am hoping for clear switchbacks on both sides. I spoke with Sequoia Nat. Park yesterday and they said most of the snow around rock creek and crabtree is now melted and that rangers recently headed out to the posts there. I am hoping for news out of there soon regarding guitar lake and the switchbacks. I will have several beginners with me and would like to avoid snow gear if possible. Let me know if you find out anymore info the next few weeks.
