My stomach isn't overly fussy, so I can eat most things during a long ride. Bananas, watermelon, peanut butter and jelly sandwiches,dried fruit, nuts, bagels, etc. I do tend to carry Cytomax sport drink, which does contain sugar. I especially need it in the heat or when the ride is long enough that my stomach does start to fuss, e.g., the RAIN ride. I think you have plenty of time to experiment with what works for you.