I agree with Ed that it's easy to replace electrolytes with Gatorade. Have you ever tried Pediolyte? It's an over-the-counter replacement beverage many pediatricians prescribe when children are sick. It's not so packed with sugar and the ingredients are great.
There was a question about food on the golf course by plutpb. I think the bars are fine but they often have a lot of fat and sugar so I try to use them only if it's a last resource. When you're on the course I wouldn't worry about trying to keep the carbs low, that's actually what you're trying to replace. Cliff Bars are a really high quality product and lower in refined sugar even though they taste great. Banana's are about replacing potassium (a major burnout electrolyte) and they are easy and taste great. I like to bake a sweet potato the night before a full day outside. You can eat it just like an apple and it actually has more potassium than banana's. It's easy when you come from home, not so easy if you don't cook or you're in a tournament. That is for the unimaginative. I have clients that travel all over the world and one just recently ordered a sweet potato with their evening meal for the sole purpose of having in during a tournament the next day. Seems the potato doesn't have the same effect in the middle of the game that a banana does. I will go no further. Motivation is everything.
Hybrid Mode
