I was thinking about something today that I don't think I've ever shared here. One regret I had after the wedding was that I didn't ask for the caterer to make "to go" boxes for DH and me so that we could take some leftovers with us. We were so hungry when we got to the hotel and since we didn't have any food with us. Also, we didn't really get to enjoy the food at our reception since we were so busy talking to everyone (plus I probably didn't have much of an appetite since I was so excited). We ended up stopping at Taco Bell to get something to eat!
Also, I would have loved to have pieces of the cake. We had three tiers and I only tasted the one tier that we cut and fed to each other. I didn't actually eat another piece at the reception.
So I wanted to make a suggestion to ask your caterer to wrap up some food and cake to take with you. If you don't end up eating it, no big deal.