Now that you are getting ready to grill, you have to answer the important question of husk on or husk off. I have grilled corn on the cob with the husks on and with the husks off.  I have even partially peeled the husk down to expose the corn to create a handle.  I think it really comes down to the recipe and personal preference.  Grilled corn on the cob without the husk leaves those nice grill marks.