That looks beautifully warm Bill - very nice!

I built a similar shelter out of silnylon a couple of years ago. I always cook over a fire so I needed a way to be near a fire and out of the rain. That lean-to style works great for that.

I have never set up a reflector on the opposite side of the fire however (except infrequently - rocks). I am intrigued by the idea of a small piece of mylar space blanket materiel (maybe 3ft x 3ft?) suspended behind the fire reflecting the heat back into the shelter. Like Cranman said you'd probably have to keep it well back from the fire, but it might still work well (and weigh near to nothing). I also like the aluminum foil idea. Has anyone tried this sort of thing? What did you do? Did it make you warmer?