The park is over-rated as far as I'm concerned but there is an interesting exhibit on the dinasaurs and tar pits and a few dinasaur bones in the visitor center. Yes, there is some bison you can hike over to see but if you take old highway 42 you will see several farms with far more bison.
It was interesting, but sad to see how the animals got caught in the swamps. To be educated and have an opportunity to observe what the animals looked like and how they might have lived.
BYOP Is the best. I didn't see any restaurants except by the highway. We ate before we got there and then brought snacks for after hiking.
There is a campground here. We didn't stay here it was to cold. But it looked like a nice campground with a little grocery etc...