Good advice from others.If you are at the same park where we stayed while
visiting the Amana Colonies,the advice about the shade probably made you chuckle. As I remember,there was no shade.
We have found that the Reflectix really does help,and easy to store when not in use. (probably not available there in the Colonies)
If it is cooling down at night,get as much of the cooler air inside,so the AC will not have to work quite so hard.Keep it on 24/7 if need be.
Hmmm...I wonder if they make RV air conditioners at the Amana refrigerator plant there at Amana? Enjoy your stay there,it is a great place to visit