Just an opinion-lived in Iowa all my life, the DEFINITION of sweet corn-wrap it in cling wrap with butter and zap it in the mike for about 4-5 minutes. Don't know if smoking it will enhance the natural flavor. Everything else in the smoker will have that smoky taste-think about the natural corn & butter taste. You can always butter & foil for a short time too, on the grill or smoker. Of course these are all good ideas but-
Some things can't be improved on.
Just my opinion based on 50+ years of chewing on Iowa corn.