I have frozen full racks of ribs in the past, it does work, but I must say that after freezing and re-heating, they are NOT the best quality, and are not the ribs you would say are your best product. At a rib fest, and depending on who's eating them, it may not matter, some might even these are the best I have ever had. The quality can be better, but you have to be very careful as to the time re-heating them. Here's what I do ( I dont recommend doing it all the time, but there have been times when I have had a lot of ribs that didnt sell, and had to do something with them, other that donating them to a food bank.
Anyway, I have a Lang 60, and it cooks hot, I do my ribs 1 1/2 hrs, wrap for 1 hour, unwrap, sauce and set in the smoker for 10 minutes. When I have ribs left, I bring them home, cool in the 'fridge until the next morning, vac pack individually in Food Saver bags. Then freeze, when I am ready to use them again, thaw ( an it will take over night) not the day you need them, so allow time. Take them out of the food saver bags, wrap in foil, add a bit of apple juice & some of your sauce and put in the smoker to heat up. Be careful not to heat them too long or you will have mush. Like I said, it does work, but......