Of course I've been there! I lived in Jackson for a little over a year before I moved to Poky for the second time. Had a season pass to Yellowstone and Grand Teton parks.
We spent EVERY weekend they were open in them. I lived in Lima, MT when I was a kid (then I moved to Poky for the first time) and my dads entire family spend most of the summers in Yellowstone and Island Park (where my grandmother still lives).
I will actually be right in Poky at Christmas time. My parents and sisters family, along with my son and grandkids, still live there. I know I bag on the city(s) alot, and mean every word of it, but Idaho in general is a great state and all the people I love are there!