Do you require a meal, and to be seated at a guest table?

I will be working for up to 12 hours, so will not be able to perform at my best without a meal. I do not take photos during dinner, and it is the only break I get during the day. I would like to be served soon after the bridal couple, so that I am finished and refueled before all the guests have completed their meal. I do not require a seat at a table, I will have my meal away from the guests.