Do You Need To feed Your Vendors?
Absolutely!

The usual vendors that are with you all day or a large portion of your day are photographers, videographers, DJs, and Wedding Coordinators. Sometimes they may have assistants who will also need a meal or snack. If you are celebrating your Wedding with a full Ceremony, cocktail hour and evening dinner Reception, then you may need to include a traveling snack pack for the Vendors, as well as an evening meal.

Make sure to double check with your Vendors if providing a meal is part of the arrangement. You should have something in writing to this effect, as well as guidelines for non-alcoholic drinks only. Most professional Vendors will abstain from all alcohol, but it is worth checking.