[DGthe3]

Another tip: when trying to stay hydrated, avoid caffeine & alcohol. Drink just about anything else and it will be better for keeping fluids in you.

And some of the signs of dehydration that I've noticed in myself at previous fests: not sweating when its hot out (typically I catch on to this when I start sweating the instant I drink something), having a mild head ache, and not needing to go to the bathroom all day long. Whenever I notice any one of those things, I down a bottle of water or something as soon as possible. Maybe even two.

Regarding salt loss ... if you get anything from a fast food joint (or even most sit-down restaurants) during the Fest, you probably won't need to add any extra salt to compensate. Its not unusual for just a single meal like that to have enough salt to do you for an entire day. And since most people are eating out 2 or 3 times a day around the Fest, low salt levels probably isn't that big of a concern. Of course, if you deliberately choose meals to avoid salt thats different. My solution in that case is to ... not avoid salt quite so much. Seems simpler that way.