Thanks. I'm still kind of torn with the camera because the lenses available are all pretty slow, which means I have to use some of my other fast lenses which are fast, but huge on the camera (camera is the Olympus E-M5). I might keep it for backpacking/hiking, then also pick up a nice full frame or APS-C DSLR. One of the problems with the Oly is that it uses an electronic viewfinder, which I do not like whatsoever. But, it is small & weather resistant, which is my chief requirement.I'd say keep the camera, those pictures are outstanding.
I know the feeling. Last time I was in Yellowstone was about 12 years ago (pre-digital for me, meaning crappy pictures scanned from slides). But, that's more intentional than not, because I am just not a fan of massive crowds in natural settings. Still, it is one of those parks that is absolutely worthy of a visit. And I have to say that sleeping in 40 degree weather was a fantastic change from all the heat we've been having.Superb pictures. It's been over 20 years since I last was in Yellowstone and these remind me why I should go back. But now I feel old!