I would use the deer decoy rather than the turkey. I think deer generally avoid turkeys, and may have the opposite effect that you want.
I use my foam archery deer target regularly as a decoy during archery only. I usually place it to pull any travelling deer's attention away from the direction of my stand so I can make my draw. Where I hunt, the deer are usually on the run from hunting pressure during firearms hunt, and no decoy will slow them down.If using it during gun season, put some orange spray paint on it in key locations to identify it as a decoy. Deer will see the organge as a light grey or white, just as they do your orange hunting gear.
You have to be really careful with scent on a decoy. I usually take the foam deer out ahead of time, descented with scent killer, and burry it under branches and leaves to get the scent off. When needed, I put it up along with a white hanky "tail" doused in doe urine (doe in heat only if the rut is on). I do not use the antlers because it will scare off any deer but the dominant bucks. I like the dominant bucks, but I am a meat hunter and will take a nice doe any day of the archery season.