I just did a search for 'fishing river bridge rv park, yellowstone national park' and they state that because of being close to bear habitat, it is restricted to hard sided campers only.
It seems I have read that in recent years there is more bear activity close to human populations, so apparently that is why these restrictions are now being placed. I guess the bears are getting acclimated to the human presense. Couple that with the liklihood of folks keeping food in their tents or pop ups......and uh oh.....we've got a problem here.....
