You've got the tripod set over the burned down embers of oak, hickory or cherry, meat on the grill grate. Wrap the tripod in aluminum foil (maybe double wrap), from just below the meat, up to the top, leaving a hole in the middle of the tee-pee for exhaust.
Don't know if you have access to one or not but a smoke jumpers burn over blanket would work perfect for wrapping the tripod with and you could reuse it.
I see lots of good ideas here. I think my favorite is the wrapped tripod method. I saw this online it's a disposable mylar thermal blanket. The cost works out to a little over a buck a piece.