I've got a custom built steel trailer cooker that is propane only. I've been considering options to add a smoke component. But I'm unsure of the logistics of offset smokers, and if there is anything I need to know or to consider. Or, is it as simple as getting a welder to cut a hole in one side of the cooker, and weld on an offset smoke box? My main reason for this is whole hog cooks. We currently do about one a year, on a cinder block pit, with all oak wood. It's great, but it's a lot of work, and if I could cook with wood on my big trailer cooker, it would be much easier. Thoughts?