You're going to be fine! My family lives in a small town just west of Venice. Every time I go, I have the most amazingly fresh veggie dishes. Every restaurant you go to has lots of veg options... I feel like they don't really emphasize eating meat as much as they do here in the states. I don't know how strict you plan on being, but I hope you break down & have gelato & cappuccino :) Mangia mangia!