It is possible to reserve seats. You would be seated at the Wine country tratoria (or what ever that is called!). It includes a glass of wine and a plate of fruit, cheese, crackers. Children get a peanut butter sandwich. I have not done it, so I can't give a great amount of deatails. Its $59 per adult, $49 for children.
We have never had a problem getting great seats for ELP. But, we dont go during peak times. I would think with an hour or less waiting you could probably find good seats.