If I am not mistaken as long as you are there with him and have yer bow with you he can legally shoot yer deer for you. Just like you posted earlier as long asit is for the season designated on yer license. I would check with yer local DNR officer though just to make sure you don't get yerself in trouble. I am pretty sure that in Iowa you are allowed to take a deer for another hunter as long as you are hunting with this person.