So I'm going to be the odd duck and say...I don't mind bringing food into the parks.
Now, is it my absolute first choice? Heavens, no! We are total foodies, and if given the option we LOVE doing the Dining Plan! But last year we decided to do an extra trip (we had done a trip about a year before, and a trip to DLR earlier in the year), after we had already spent most of our vacation funds. We decided that we were willing to stay with my parents in their RV (which, while a lovely Class C RV, is still pretty cramped with 5 people) at FW, and take in most of our food after a big shop at Target on the first night. We took in (for two adults and one child) various meats and cheeses and crackers, yogurt, hummus and carrots, granola bars, trail mix and the like. I wasn't originally super excited about it, BUT I would rather do that and get an extra trip to WDW than not go at all.
After doing it....we actually really enjoyed it! We found some great spaces to picnic (the new eating/rest area near Rapunzel's tower/bathrooms!) and didn't have to wait in food lines or find seats in crowded eating areas (especially nice with our stroller). We could eat on the go pretty easily and felt like we got more time for attractions. We did budget for a few meals that were really important to us (50s PT, Hoop Dee Doo, Chefs de France and Trail's End breakfast) and kept a separate alcohol budget, but for the first time...we actually stuck to our budget!
Granted, I think this is only really possible if you have a fridge in your room, and is most ideal if you have at least a kitchenette or full kitchen. So if you get a good deal at a value resort with a FDP, then by all means do that. But after this last trip, now having done it, I actually really would recommend bringing in food.