Very, very nice shots! I was there too over the weekend showing my friends around so I wasn't really able to shoot a lot.
I was also there a few days before Christmas when there was a lot of snow. I wished there was more snow over the weekend, but I guess Global Warming has changed that!
I only used 1 lens the entire weekend: TS-E 24mm 3.5L II. I didn't even bother using other lenses. I think those who were shooting with 70-200mm were there for the Fire Falls near El Cap.
Here's one of my shots from the weekend.
I just came back from Yosemite. I have to admit that February is now my favorite month to visit that region. The valley floor is still a bit busy, but the hiking trails are pretty quiet. I was not able to see the Horsetail Fall's Fire Fall due to it being cloudy when I went to watch it. There were well over a hundred photographers there waiting to catch a shot though! Anyhow if you have the option too, I would highly recommend staying a weekend in Yosemite during the month of February. Just don't wear tennis shoes!!!
I did notice that about 80% of photographers were walking around with a 70-200 F2.8 (canon/nikon/tamron/etc.). For the life of me, I could not figure this out! For my entire trip, I was constantly reaching for my 14mm uwa lens. If that was not on the camera, the 50mm was. I only put my 70-200mm on my camera 3 times over the course of the trip.
I do understand wanting that focal range for the waterfalls when observing from a distance, but these lenses were everywhere. Does anyone know why everyone in Yosemite has that lens attached to their camera 24/7???