TRJ...most of the restaurants are tray-food type of places. Nothing special but acceptable. The Edge is the other sit down option. Not too pricey, kind of TGIFridays quality of fare. Copper Mine looks fancy at least but have never eaten there. Looks like a good romantic dinner type of place. The Edge is usually pretty rowdy as there is a bar and sometimes a band.
If you try The Copper Mine let us know how it was. There is a new option at the bottom of the Mountain, behind the Ski-Barn. Devils Backbone brewery or something like that as well.
I usually dine with a 12 year old, so you might want to consider the source. Here is my ski partner partaking of a typical on-mountain meal. http://www.flickr.com/photos/nygrk/3206709127/