oldman - what type of smoker are you using? i have a little chief that is perfect for uses such as this.
as ronp says you can spread it thin in a pan and mix it around now and then. another thing you can do is get one of those pans with holes in the bottom or some sort of screen and do it like that.
fresh, i see no need to probe it for temps, a half hour or so on smoke, maybe 45 minutes, should be just fine. i'd recommend temps in the smoker be as low as possible jsut for generating smoke and not for cooking.