I don't know if these were elk or red deer.
However, with regards to the carrots, they sell them at the entrance and people seem to love feeding the critters. They are very chill. If they walk up to your car (everyone remains in their cars) and you have no carrot to give, they just leave and check out the next car.
The only incident I've heard of was when idiots drove through the bison area with windows open. There was no way to not know to keep windows up.





