Re: Snacks for the kids
My wife cuts up a bunch of fruit--mostly melon types, maybe some apple thrown in there--and also brings berries, whatever happens to be in season. Our little guy loves that stuff. She'll prepare it ahead of time and put it all in a big tupperware. Works for a weekend outing, but probably not ideal for longer trips.
Also, frozen yogurt sticks (which tend to melt and then are just yogurt, but still just as yummy for our guy).