If one stops at Old Faithful, far better to bring your own food from somewhere else.

The food in the restaurant near the Visitor Center is quite possibly the worst I've had, the others I ate at inside Yellowstone not a whole lot better.

"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744