I just bought at Publix one of those backpack picnic bags. The back section is a cooler and the front section carries plates silverware etc for picnics. I plan on taking all the eating utensils out of the front and using it for our supplies (sunblock, bubbles, change of clothes for DD etc) and loading up the back with snacks and juice. It comes with a side attached wine cooler which will be perfect to keep my Brita bottle cold. As you can tell I am a dork and am very excited due to this "disney" ppurchase. The one I got at publix is greena nd was only $19.99. I have seen them online for a lot more. I ususally carry a bag or backpack with a little cooler and it is a hassle for me with the stroller etc. I always seem to ave several bags etc. I will consolidate now!!
Have a good trip!