We were just there and ate in a "car" that had 3 seats. Our two kids sat in the front seat, DH & I were behind them, and two other people were behind us. I did see a family next to us who had a high chair pulled up next to them so that is how you can work it out.
We had three kids in the front (8 year old and two 11 year olds) and then two adults in the middle and two adults in the back. The three in the front were not crowded and one is a big kid.