Oldie Moldy wrote on Jul 7^th, 2012 at 5:01pm:

Solo Tripper, Gosh don't know how I missed your great idea about the silicone pad used for insulation! Going to the hardware store now to check them out. Sorry I didn't respond at the time, wouldn't want anyone to think I'm a pigeon-toed ingrate! Just part blind. Best Wishes, Rob

Been giving some more thought to your problem.
If my silicone pad idea doesn't do the trick alone, I have another thought that may be of some use?

What if you cut a series of holes around the sides of your upside down pan, say 3/4-1" with a hole saw maybe 1" apart. This would allow heat to disperse and hopefully combined with silicone pad, solve the ground scorching problem?
Side benefit is you'll lighten your kit a little bit.