This site seems cool! Can someone point me in the right direction on this site? Are posts organized by parks? I've been to a handful of good ones in the backcountry, and I'm also looking for advice on yellowstone.
Welcome to the site. Not organized by parks but go to Home and look around that page, you'll learn lots in short order. There's a lot of Yellowstone enthusiasts here. Most if not all your questions will be answered thoroughly.
@Joey posts awesome trip reports with videos from lots of places including Yellowstone. I am familiar with the Cascade Corner [Bechler] and have travelled the SE corner on horse MANY years ago. I remain intimately familiar with Grand Teton, the southern Shoshone NF, and Northern Bridger-Teton National Forest which IMO offer far more and often "better" hiking options than Yellowstone.
Post a thread with Yellowstone in the title and ask questions.