I did it the easy way. I made the quilt, got some 1 1/2" masking tape, set my machine up on a rubbermaid container in garage, shut the garage door, got the leaf blower ready, sat down in the driveway with the old bag, scissors, quilt, tape, painters mask, and two garbage bags. Opened one baffle at a time, filled the quilt baffles a few at a time, taped them shut and went to the next ones. When they were all filled and I was satisfied I put the left over down in a kitchen garbage bag, threw the old bag away(in a kitchen bag), leaf blowered the area, opened the door and sewed one baffle at time. I was suprised at how little down I lost. And there were only a few to blow out of the garage when I was done.
Everyone has their own method to suit their needs. I hate chasing feathers around for a month so I just do it outside now. The one thing I would recommend is to use a painters mask or at least a bandana. A feather in the lung might turn into something bad.