Another Nuuner here and also an Ultima user but Nuun tablets are so easy to carry. As I am a "pootler" love that and not a racer, I carry a Zimbale Top Rack bag and can put my PB and Honey sandwich in there. Depending on the length of the ride, I stop every 15 to 20 miles, stretch and have a small snack. I also carry an emergency supply of JellyBelly electrolyte jelly beans. Those things save my butt when doing rim to rim of the grand canyon (hiking not biking) a great treat when the mantra in my head starts saying "no you can't" instead of "i think i can"
I am allergic to soy and most energy bars give me stomach cramps too.