Yes, hlbtimes2, I was just going to say the same. We bought the packets at Walmart (was thinking I was just getting them for me, but DH grabbed 3 or 4 boxes of them, cleaned them out!) I said, "How much do you think I'm going to drink?!" and he said he thought the kids would like them, too. (He found some powdered Gatorade for himself, which I can't stand.)
We are flying in, so won't be able to carry in much in the way of snacks and drinks. We are planning to order groceries from Albertsons to be delivered, so will order plenty of water bottles; this hopefully will save us a bit of $ in the long run.
Even if you don't want to drag a bottle or two around the park with you, just bring a packet or two, then drop them into bottles that you buy.