If you are going to be reheating on Sunday, I would skip vacuum sealing. When storing ribs always wrap in plastic first. Don't let the ribs come in contact with the foil over a length of time. I found that when I wrap smoked food directly in foil for long time storage, either chemicals from the smoke and/or salts in the rubs react to the aluminum. Store them in the refrigerator. Just before reheat, remove plastic wrap apply a splash of apple juice, or you favorite sauce and tightly seal in aluminum foil and reheat in an oven. I used to reheat at 300°F to 350°F, but now reheat 250°F to 300°F. This can take about 30 minutes to an hour; depending on how much food is being reheated and the temperature of the food prior to reheating.
I have also used a technique called "Flash reheating" on ribs that works well on the grill or in the oven. For spare ribs I cut the ribs into their individual servings, but for baby back you can reheat without cutting first. Set food out at room temperature for 1 to 2 hours; lay single layer on a cookie sheet or grill and reheat at 425°F - 475°F for 2 - 10 minutes; depending on the cut. During this time you can hit them with another application of sauce or mop. The theory is to bring the meat up to a safe reheat temperature quickly; preventing it from recooking.