That is definitely Pedialyte in the picture. Also, when DS4 was about 1, he had a terrible stomach virus, that put him in the E.R. The E.R. doctor mentioned Pedialyte, but also said he could have Gatorade.
If you can't get it onsite, Turner Drug will deliver any product they carry, for a fee of $5. The front desk of your resort will have contact information, as will First Aid in any park (and, well, okay - the phone book in your room )
Yes they do sell it.
We spent half our trip in September with sick kids...
I bought some at the resort but my kids wouldn't drink it.
They only carry the apple flavor so if you think you might need
a different flavor I would bring some...
My kids only will drink the grape or plain flavors...
Bring some hand sanitizer too...
And maybe some lysol...