Inject with favorite flavoring... Cajun seasoning and butter was normally my go-to. Get the peanut oil a bit hotter than you want to cook the turkey at, because when you drop the bird in, the temp will drop and takes a while to bring it back to temp. Make sure and rest the bird for a while after you take it out, covered tightly. That will help the juices set in evenly while also keeping it piping hot (it'll actually continue to cook a few more degrees while wrapped). Really no need to brine a bird you're going to fry, but it doesn't hurt. Just make sure if you do, get all the water off and dry it well before dropping it in the oil.
I haven't fried on in several years now, but I have an oil less fryer now so I'm tempted to do one again this year.