Yes, that's one problem with Gatorade. If you use it for water and electrolytes, you'll slowly go downhill. Endurolytes, you can take as many as you need, separate from hydration. On tour, we're taking Endurolytes, otherwise just food. Very light, not much space. Doubt we'll need them much, if at all.

Don't really need potassium in an electrolyte replacement, since there's so much in food. I think everyone knows to grab a banana in a store - just don't eat it on the road and drop the peel - that not everyone knows. Salted peanuts, raisins, M&Ms in a bag, by thirds. Tastes good, cheap, works.