Don't give up on a good smoke!!!!
Get some cheap hand warmers to lay around the Mav, or as stated, just keep it close to the drum, maybe throw a rag/towel on it too to keep some of the radiant heat from the drum to keep it cozy. I'd say it'll likely be fine anyway.
I've cooked with my Weber remote thermo in the rain, cold, everything (within reason) and no issues. Some creative wind blockage and maybe a blankey for the drum will help lots.
So far in recent holiday cooks, I've pulled off great things in the midst of rain, snow, sleet, wind, and COLD. NEVER regret toughing it out.
We're forecasted with heavy rain, wind and thunderstorms, but you can bet your arse my two turks are goin on the stick burner as planned! I'll utilize tarp, rope, EZup, whatever it takes!!
SMOKE ON!!!:becky: