When we went in july we froze about 8 bottles (poured some water out first) and put them in our soft sided cooler and took it as a carry on (you just can't carry a cooler with ice). We packed other bottles in with our luggage (a few in each bag). Then we had another soft sided cooler in our luggage. When we got there we had the one cooler with frozen water we took to the park. The other cooler we put in the room and put more water on ice from the ice machine. This save the $10 per night frig charge. We always had cold water. The frozen water melted nicely (so did we) through out that first day. It worked for us. We even had a few bottles we had to bring back home with us.
