We're flying down and renting a minivan (family of 7) and I was planning on picking up groceries when we get there...what do you guys do? I'm worried that I will spend way more near Disney than I would at my local stores mainly because I will be unfamiliar with the pricing and layout. We're flying SW so we can check plenty but we'll have a stroller, car seats and a Pack N Play to manage along with our 5 kids!