That is a very tricky question...
Pure water is the best for everything.
There are lots of things you can use to add some taste and make it easy to drink but there are some considerations about that as well. For sure those electrolytes are the best options but they are not cheap.
In a camping trip, where exercise is not the focus, all those already said, should be fine. Coffee, tea bags, those juice powders...
If you are for something a bit more intense, you need to take in consideration dehydration. Teas and some juice powders have diuretic effect and you will get more dehydrated, which in this case I would prefer the electrolytes drinks.
If you are doing that most of people wouldn't, Water will be just fine.
Some times, when I'm on the go in a really long/intense trip, I feel that after half way, it gets hard even to eat. My body gets so tired that even digestion becomes hard. That is when I start on soup packs and soft food. The same thing for the drink. More pure water, your system will work better. :)