Food for vendors

I agree with Carmel on this point, definitely review your contracts, as they may have noted their preferences there. My photographer was the same that they mentioned they could leave to get food, but would take away from them performing their duties, and it was more important for me to have them there, than the additional cost to feed them. I just have them added to my guestlist so I will be sure to include them in my head count.

I agree with all the previous comments, feeding whoever is there for the evening, especially while others are eating and if they are working a full day

I plan on feeding my photographers as they are the only venders we have.

You should defiantly be feeding anyone that is staying for the evening.

If your vendors have to stay at the venue and work the event while everyone is eating, you need to feed them especially if they're there for the full day. Typically this includes the wedding planner/coordinator, their assistant if there is one, photographer, videographer, DJ, and any entertainment related vendors.

Decorators are usually gone in the afternoon prior to guests arriving and come back at the end of the night to tear down and pick everything up. Unless they stated there's a need to feed them in their contract, they're usually not expected to be fed since they're not around during dinner service.