Mr. Barton, why is any of that necessary?
Just show up (both of you) at the designated place, lay the post money on a table over to the side and start playing. Been done that way forever...why make it complex?
Even the dumbest pooch knows you'll both have tush hogs there going heeled in case of an attempted heist. You could even hire an off-duty cop for a couple of hundred and he could just sit over there in a corner with a pump shotgun and keep an eyeball on everything.
It's a private affair. Charge the spectators 100 bucks each to come in and watch. If they don't like it, tough, they can hit the street.
So simple.............JUST GO AT IT!