It's not quite like giving Haribo though, dried fruit and yoghurt at least has some nutrients in, Haribo doesn't apart from boiled horse. I always feel like sugar, and to a certain extent salt, gets traded against the benefits of what they are eating.
Also malt loaf - you can get the banana one wrapped in individual bars. Yum and lactose free (last time I checked!).
Goodies cereal bars Raisins Cheese strips or babybell - put in cooler part of bag next to water bottle normally so as not to melt or get too warm. Individual packaged biscuits - these are a real treat and used when going somewhere I need DS quiet or well behaved Satsuma or mandarin
Bananas Babybel cheese banana muffins - make a batch up with half the recommended sugar when you have a load of overripe bananas, and freeze. On your way out, grab a frozen muffin. Will defrost in time to eat a couple of hours later (well, in the summer!) Yoghurt covered rasins (if old enough) Other dried fruit - I loved apples and pears as a child.