Of course the restaurants just like the resorts have their own private numbers, all the numbers you call for both resort and dining reservations are off property by cast members who arent told any extra info outside of how to book the reservations, what is basically included, I know bc I worked there..lol
Now as far as the getting the phone numbers those arent normally widely publicized but sometimes you can google and get them...
I think you may have to wait and find out what you can order when you get there, the chefs can normally for allergy reasons fix something off menu, however normally the consensus for ordering off the menu just bc you like dinner menu better is normally a no... But it never hurts to try right???