Vixen, and Guest of 1st June: There are loads of workshops including Northwest Fiddle Tunes (Boat Band), Talk, Write & Sing (Jez Lowe),Singing (Witches Of Elswick), PA for Beginners (Sean Taylor).
Details are in the Event Guide.
As for food, I don't know the details for this year, but there are always good food stalls at the festival, including vegetarian options.
Perhaps someone from M-FAB can post details?