Hey, I've been to all three of those spots! ...only not in February

Fantastic pictures. When I was at the Diving Board, I couldn't get the monolith of Half Dome in the camera view -- it was so huge! You guys had the proper wide-angle lenses.
For fun, here are several more from Sheldon's FB page taken at the Diving Board:

You guys are so freakin' close to the edge there! It's actually an overhanging edge.