Like Starfish, I use Nunn as well for electrolytes. For fluids, I alternate 'lytes and water my whole ride. Don't eat huge gobs of food on ride, just carry Fig Newtons, peanuts and usually I'm not into those until after 3 hours.
Will leave some Clif bars and bananas in vehicle for my return. It really is so individual.
I have found that since I have cut down my overall sugar intake, I do not have the highs and lows I used to. Increasing my protein and fat to where it should be has evened my blood sugar out..it feels so much better.
"You can't get what you want till you know what you want." Joe Jackson
2006 Cannondale Feminine/Ultegra/Jett
2012 Trek Speed Concept 9.5/Ultegra/saddle TBD