Jim,
I hear this a lot, and I see a LOT of color work of these locations, but other than Adams himself, I seem to see relatively little published large format black and white landscape work these days. While places like Yosemite Valley and Antelope Canyon are swarming with photographers, there are many other places in the American West that are no less spectacular that receive far less attention - at least from the large format crowd, especially the ULF "crowd" (not really enough ULF shooters around to call them a full-fledged crowd).
Back when I was shooting full time, I hit all the popular spots, many multiple times, and I frequently ran into other full time pros, but they were all 4x5 color shooters. Other than one guy shooting the Watchman from the bridge (literally on the shouder of the road) in Zion with an 11x14, I can't recall ever seeing a ULF shooter in any of these locations.
Personally, as my travel time is limited these days, I plan to shoot closer to home - here in Oregon and neighboring Washington. Plenty of "grand" subject matter within a few hours drive. I'm sure there has to be other ULF shooters here in the NW, but I have never seen any out shooting in the places I like to go. So, maybe I'll be the first to haul a ULF rig into some of the places I plan to go.
Kerry