My DD is also a vegetarian... we have had almost 30 trips to WDW and have never found it to be a problem. Additionally she is allergic to nuts... all kinds of tree nuts and oils... First I always make sure that I inform them when making our dining reservations of her allergy and that shes a vegetarian. In many cases the chef has come right to the table discussed with her what she likes to eat and then has made a special meal just for her. This has happened at BOMA, princess dinner in Norway, Mama Melrose, California Grill. In the case of the buffets.... they talk to her about what is on the buffet... what she can eat and what she can't... they are very helpful....