One of the RV's may leave on Friday. We will want to keep the camp shade up and running.

My first thought was a large span of Aluminet supported by the RV's. My fellow campers think it will sag like a big hammock in the middle an become a bathtub shape.
The other thought was two carports like this one:

My main concern about these is that they will become a kite in a windstorm.
Any shared experience would be appreciated.