I've reheated ribs directly over heat on my gasser the following day or so and they have come out good and bad...
Good: Ribs were smoked just to the point of being done and then cooled quickly so that they didn't continue to cook or dry out. reheated over med heat in gas grill and they were great! Good if you plan on adding a sauce before you serve as the sauce will set nicely on the ribs.
Bad: Smoked the ribs, ate dinner, ziplocked leftovers, reheated on a way too hot grill for too long (got side tracked somehow and fergot about em') the fat renders quickly and can flare up. The exposed ends were nearly inedible (dry & crunchy).
To me reheating in a vacuu-sucker bag might make them a bit mushy... I like my ribs lightly dry rubbed - no sauce and spritzed with a sweet (raw local honey) and salty (soy sauce) and sour (apple cider vinager) spray.
That produces a light glaze and slight bark to the exterior that goes totaly wrong even in foil...
Shoulder I prepare in advance quite often - I foil my butts and drain off the fat but keep the juices and add that to the pulled stuff. To reheat I place in lrg pot and add about a 1/4 - 1/2 cup of water per butt and reheat it slowly on med low heat.
Always turns out moist and flavorful that way for me.
Have fun! :biggrin:
