By request (mostly on Facebook in the Glampers on the Loose group) I promised to make an awning tutorial. It took far too long but I finally published it this morning. It's full of tips, illustrations and some photos. I hope it's helpful if you've been wanting to have a go at making one yourself. And a special thanks to Doug Hodder whose thread first inspired me to make my own domed awning. There is a direct link to that thread in the blog post.
http://theflirtyguide.blogspot.com/2016/02/how-to-sew-diy-trailer-awning.html