We have mesh stroller bags on our strollers as well. I keep sunscreen, change of clothes for the little ones (in ziplocks in case of rain), maybe extra hats or sunglasses in there. I also have a clear bag that I hang on the stroller for diapers, wipes, disposable changing pad, bags to throw diapers in, etc.) That way I don't have to dig for them when I need them. Then we have an insulated backpack for water bottles and that goes in the basket under the stroller and then a backpack with the rest of the stuff. We usually take way too much and are really trying to bring less this time. Oh, but I am letting my older dd have her own backpack for her autograph books, pressed pennies, hat, sunglasses, etc.