A nice bowtop wagon from Traveller Dave’s website. There are many “real” living wagons and rolling homes there in case you are in need of inspiration.
I like the window but the builder in me sees it as a sure source of leaks.
Adventures of an Imperfect Man In Search of a Handmade Life
Preindustrial Craftsmanship 
Yeah I agree. I did see a picture once of a bowtop that the sides rolled up a little for venting it out.
George: Can I send pics of my wagon to this address and you’ll get them?Mike Date: Sun, 23 Sep 2012 17:33:55 +0000 To: mpwild@hotmail.com
I just sent you an email so please send them to that address. I can’t wait to see them.