Vendor Meals?

Hey, y’all! I’m currently working on estimating numbers for catering, but I’m not entirely sure about vendor meals. I’m planning on having meals prepared for my coordinator, photographer, and videographer, of course, but I’m having a Catholic ceremony, so my DJ will only be present for the 4-hour reception. Does he need to be included as well? I imagine it’ll come down to the contract (we haven’t booked a DJ yet), but if the contract doesn’t mention a meal, would it still be considered proper etiquette to provide one? Thanks in advance!