Looking for a backpack diaper bag....

[sophiesmom]

I have an almost 4 year old (potty trained) and almost 2 year old. My LE Little Tripper is a bit to small, and the Do It All is too big at this point. I'm looking for a reasonably priced backpack (talking 50 or under!) to carry: change of clothes for each, wipes, @5 diapers, snacks, small first aid bag, and 2 side pockets for 2 sippy cups.

Any ideas would be great....

Is the LE diaper backpack too big?

Thanks!