Dunno if you guys tried this, but we used to do this back in Wisconsin when we cooked corn on the cob on the manifolds of our vehicles in the winter...
Basically, soak your corn in water for a few hours, then before you grill it, wrap it in bacon, then wrap again in tinfoil.
When the corn is done the bacon can be pretty nasty, but the grease acts as both butter AND salt.
Try it its awesome!