The last time we did DDXDP, we ended up with a quite few credits, we were living in GA ( so we drove) at the time so we had Breakfast at Chef Mickeys, went back checked out of our resort, headed for DTD as it was known then, did some shopping, then used what credits we had left for sandwiches and drinks at EOS, and snack items from Goofy's.
I have some friends that do the same thing but enjoy their meal in the airport and pack the snacks for when they get home, they do fly out early sometimes, so they head to the bakeries or QS or shop in the resort store the night before.