Can cooking on the WSM in the rain be done? I've done 2 cooks on mine so far, and have been planning to smoke 5 racks of baby backs, a 7ish lb pork butt, and some chicken thighs on my 22.5" next Saturday for my daughter's 2nd birthday. However, the forecast is calling for rain all day next Friday, Saturday, and Sunday. Assuming a regular flow of rain, is it even possible to cook on my WSM? Or should I come up with a plan b? Thanks!