Larry,
Look at it this way...where the bone used to be....is simply another spot you can put more rub before you tie them up. I have also put med whole onions and a head of garlic...along with rubbing the exposed meat up in there...tied her up and cooked it. Came out great when I did it. All I end up getting around here are boneless butts...even from my butcher...who by the way...ticked me off when he sold my wife that brisket flat instead of the whole brisket like I ordered....LOL How'd the dang butts come out in the end?