First, Karen makes a good point about loosing heat or having to cool any extra space.
I think I'd also have to agree with Beth in that I'd like to be able to see out the front, too, if I wanted. I certainly had a limited view at the state park I was at using the bonnet. I also worry that if I was bookdocking and needed to leave quickly for safety reasons I certainly wouldn't want to have to deal with the bonnet!
So I'm thinking I'll make a curtain, just not sure what to make it out of, or how I'll attach it. Another good excuse to go visit Little Missy and sit and ponder "stuff"! I love just sitting in her!
But for right now I think I'll go look at the pictures I posted in Show Off Your Rig to jump start my brain.