Yes, changing bags are an invention of the devil. But - - -

they work. And with reasonable care, the dust problem can be managed.

First, don't get the smallest bag available. I don't know the dimensions, but while my first bag might have been fine for dealing with 35mm film, it just wasn't large enough to handle 4x5 holders and film boxes.

Second, keep the bag wrapped in a plastic bag, taking it out ONLY when you are actually using it.

Third, try to avoid the "working in your lap" scenario. Find a desk or table - or put it on a chair and sit on the floor. Don't try to hold up the bag at the same time you are working in it.

Fourth, work in steps. Unload the holders, transferring the exposed film to boxes for storage. Then, take the empty holders out of the bag, and use a small brush to knock off as much of the dust and lint as you can. Finally, put them back in the changing bag, and reload with fresh film. Then, after you are done, open the bag, shake it out, and then quickly fold it up and put it back in its plastic storage bag.