Is there a concession area or food options inside? Or can we bring lunch in?

They do have snacks and soda machines

They have a coke fountain, and different snacks usually not sure with covid, but as someone mentioned there is picknick tables outside in the parking area. Not sure about outside food though.

where are there chips and candy at the caverns? there is a coke machine but no snack machines

There are chips drinks and candy. No sandwiches. Outside food is not allowed but there are picnic tables in the parking lot and covered tables under a pavilion by the entrance.

There are snacks, sandwiches, n drinks, yes.