OK MOMS please tell me what type of bag you carry into the park??

[carcam51]

I am planning on carring a Camelbak FlashFlo or Day Trekker. This is a fanny pack/hip sack with the water built in; you then are able to drink from the attached tube. They both have storage compartments for cameras/money/sunscreen etc. I don't want to have to be bothered with bottles of H2O so I'm hoping this will work. Did I mention the water is kept cold?!