I try to keep our OWB going until we open the windows at night and even then if I have dry oak and no bark on the wood, I'll burn even longer. I heat the water with the OWB and all that scrap wood that everyone leaves behind. Most of the time June 1st is close to the end of the OWB for me..
My smoker gives off more of a smoke smell than the OWB does. If the air smelled like Ham, I'd still be heating water...