Cut the back straps out. (You can do this even with one of the big nasty ones) I've done this multiple times.
Clean up the back strap and cut up into chunks approximately the size of a bite sized Hershey bar(ish)
Marinade that over night in Allegro Marinade the night before you want to cook.
Wrap each "bite" (size depends on you, I usually use these as appetizers, not as the actual meal but they go well with a Brunch or whatever too) in 1/2 o a slice of Bacon. Put a toothpick through it.
Grill as desired, careful to watch for flareups because of the dripping bacon. I promise you, you would have people that "would NEVER eat wild hog", finishing these before anything else. I have outpaces other guests sausage rolls, snacks etc etc, as soon as word got around.
Never had an issue with what size, age, sex the hog is.