I agree with what another poster said, maybe everyone else missed this, or I've misunderstood something?
These are all great suggestions for re-heating ribs, but if you are smoking these only THREE DAYS before you plan to eat them - then there is no need to freeze, IMO.
I would take the finished ribs (no sauce applied yet) off the smoker, cut them into 1/4 or 1/3 slabs, and just put them into big ziplock bags.
Two days later, remove from the bags and line them up in a big foil roaster, cover with heavy duty aluminum foil TIGHT (w/ some apple juice in the bottom - maybe 1/2 cup each roaster pan) and heat them for one hour in a pre-heated 250° oven. Pull off the foil after one hour, apply any sauce needed, and after 10 more min. back in the oven uncovered - you're done!