For one day I would do OOP. As a family we usually do DxDP. We love to eat and hit at least one character meal each day. We spend WAY too much time eating LOL! That being said if you are going to Epcot to do the attractions you would be doing DDP at the most (sorry, I am making a presumption here) and I have never found the DDP to be a real money saver overall. You still need to tip at the TS and if you do two CS, OOP would be much cheaper.