I've got one of the spring loaded parallelogram brackets that you get at BassPro Shops. Works fine. I mounted it far enough away from my main that I can turn the main without hitting it so I just use the main as a rudder. Works fine for a git home. I suppose if you were wanting to use it a lot, for trolling and maneuvering, you might want one of those linkages, but for a git home it's not necessary.
One thing I would say is that you need to clean your bracket motor whether you use it or not - it gets a lot of saltwater splash - bad news.
I am a Sea Tow member also - gonna get a Spot2 pretty soon also, so I don't bother with the bracket motor most of the time any more.