So I thought I would report back on this.
We went to Wally World and bought the curtains and rods shown in the pictures.
Mother-in-law cut and re-sewed them up for us and we installed them yesterday.
I wanted the curtain to go behind the accordion style day/night blinds we have now (they should be called day/night as they let all kinds of light in).
It was a tight fit on the top as there is not much room but we were able to put the rod up and behind (closest to the window) so you don't see the curtains when the blinds are closed.
We then have two very small windows on the slide out. There really was not way to attach curtains there so I got the darkest window tint I could find and tinted those windows.
I will report back after our first camping trip to let you all know how it will work.
Thanks for the help.