The Current Grady County Sheriff will sign for NFA.
The main advantage of the trust for me, is the ability of other people I name to legally have and use the item without my presence. If yore considering a trust, shoot me a PM. I too live in Tuttle, and Ive got one you can have a look at.
If this is the case, then that is what I would do for sure. If for no other reason than that my wife could use them without me.