I definitely wouldn't use green wood in a drum type smoker. If lump or briquettes are all you can find then try to find some made mostly of the wood you usually use.
It'll still be tasty that way. However if you use green wood you run a serious risk of being an unhappy camper.
Also....dang it's tough to beat you guys to the punch. I was all ready to tell him it happens to a lot of guys and not to be so upset.