"Oatmeal" - that seriously cracked me up this morning, lol.
Strangely enough - I immediately recognized that Schego heater. I'm not saying I melted one of my brackets... (well, maybe I am saying I melted one of my brackets...)
I think it's a great idea of gluing some sand, rubble (etc.) to the opening of the PVC pipe. That way it will almost be camoflaged completely.