I took my kids (10, 6, 3) to the doctor's office for a checkup yesterday and I carried my large Vera Bradley backpack with 3 ipads, 2 3DS, games, snacks, 2 coloring books, diapers, wipes, 3 water bottles and my stuff (wallet, keys, lip gloss). It felt like it weighed about 100 pounds, I don't travel light but I realize I won't be able to carry EVERYTHING like that for a full day at the parks. How big a bag do you carry for three kids and what do you take? (Kids will be 11, 8, and 4.5 years old at time of travel and we're planning on no stroller.) I am wondering if I take 3DS it will add extra weight but keep DS quiet in line? I need iPad, heavier than iPhone, I know, but I don't have iPhone, will use iPad for camera and Disney app and some entertainment while waiting.