I ordered the Foodsaver expandable bags to freeze our turkey. They’re serious about the extra space at the end of the bag so you can get the pleats back together; but, even following their instructions, this is almost a three person operation!
But I came up with a trick — once you get a side pleated, use binder clips to hold the side together (I used two clips). Then get the other side tucked and use binder clips to hold it in place. Now that it’s all held together, slide the clips to ensure you have enough plastic to fit into the vacuum sealer. Seal it up. And again. I moved the plastic out a bit and double-sealed another line. And a third … because it would really suck to ruin a huge bag of food like this!