Thanks for posting that, 2gypsies. Mostly pretty simple to understand regs.
I haven't fished Yellowstone in 20 years, but it was the site of one of my most memorable fishing trips. (Stop here unless you want to read about fishin an finaglin.)
A good fishing buddy of mine and I were fly fishing on the Yellowstone. It's got great fish but is crowded to the max. The Russian River on Alaska's Kenai Peninsula during the red salmon run used to be close, but this was crazy, as in, wait for someone to give up his space, then take it.
The brown trout were splashing all across and up and down the river. But NO ONE was catching a thing, not even with all their fancy new L.L. Bean vests, waders and fly rods. (Sorry, but some of us "locals" have to chuckle at high fashion fishing dudes now and then.)
We knew there had to be a hatch in progress, so we waded the shore enough to find the bug that was causing all the ruckus, gathered one up and took it to the TC (25 feet away), where we each had a fly tying kit, and tied up our versions of the bug. (Big difference between his and mine, btw.)
We walked back to the shore, waded out a few feet and each cast our lines. POW! We both had immediate hits. Nice fish, around 20". We landed them, set them free (then legal), cast again, and the same thing happened. It wasn't long before we had 20 fishermen crowded around us trying to see what flies we were using. Some asked. My buddy gave our flies names and told them we'd gotten them at a fly shop down the road 10-20 miles. (Snicker)
We had the whole river to ourselves! Well, compared to what it had been. We each landed 15-20 in the next half hour, then took off (in the other direction) before the Bean Brigade once again descended on us! LOL (I was just NASTY in my youth!)
