PP posted what does happen during dinner. I disagree about the food though, I thought it was good, not great, but quite good. I had the spring roll appy and really enjoyed it, the bread and butter was delicious, and the pasta entree was amazing! My DH and Mom had the prime rib and both liked it.
I don't use the dining plan anyway so I can't comment on the 2 credits, but we went last February for dinner and this coming February we are going back for Lunch just to try something different but still be in the castle.