Re-entry to Iguazu Falls Argentina

We are staying at Sheraton Iguazu in the Argentine park for 2 nights. We plan to do a half day trip to the Brazil side on the second day. I know we will be paying the Brazil Park fee to enter there, and we will have paid a fee to enter the Argentine side when we arrive.

But will we have to buy pay a second Argentine entry fee to re-enter the park and get back to the hotel on the Argentine side when we return? or does the fee we pay to enter Argentina's park on the first day cover for both days?

And what is the current fee for the Argentine side in AR?

The official park site

http://www.iguazuargentina.com/en/pase-2do-dia/

Says second day is 50%.

Fees can be found on that site too.

If you are staying at the Sheraton inside the park there is no fee to re-enter. At least there wasn't last time we were there. I'd suggest you ask at check in if you don't find a definitive answer about current policy before your trip.