There are many things you can prove or disprove for yourself with a little experimentation. Get a bag of rock salt, the kind you use on driveways (no iodine there). Dig a shallow hole in an area deer are known to frequent, pour the salt in the bottom, and cover it with dirt. You will soon find how "odorless" your non-iodized salt is.
There seems to be some "mystique" about iodized salt, I hear people say (in all sorts of applications) "Oh, you can't used iodized salt." I know of no application (other than maybe some specialized chemical applications) where the iodine in iodized salt is detrimental. But if you happen to be human, the iodine will help prevent goiter.
Endeavor to persevere.