I can't remember if I was in Fishing Bridge or a campground near it last year (we got moved out of a bear area due to soft-side PUP). Either way, I'll agree that it won't be a concern and I'm both a worrier and rule-follower.
Each day I was out before sun-up to take photos. Back at the camp a couple hours later and it was still relatively quiet because early-birds were gone and rest just waking up. Most people were quiet and respectful and rarely interacted with "neighbors" because you aren't in Yellowstone to sit around the camp. There was one group of young adults raising a ruckus at night that was frustrating. As others stated, if you're not that group, no one will notice you at all.
Thanks goodness for digital cameras now so you don't have to ration rolls of film at a place like Yellowstone. Enjoy your trip!
