Agreed on the annoyance of orange boxes!
I love the envelopes for twills. Mousselines get a bit crushed, and cashmeres are just too much fabric. (Probably 140 silks would be too much fabric, too, but I don't own any.)
I tend to drop my scarves somewhere safe from the cats when I get home and then every few days put things away. It takes just a few minutes, but I'm lazy. Filled and empty envelopes live in the space above my sweater baskets if they haven't made it back to the box yet, and I don't tie an envelope to a scarf. It sounds like you have a bunch of scarf information on the envelope - all my obsessive documenting lives in my computer or Evernote.
I also organize by name, not color, as sometimes it's just too much mental effort to define which is a primary color for a scarf. (
Into the Canadian Wild, anyone?)
I will note that the plastic on some of my more-used envelopes is loosening from the paper - I need to spend some quality time with sellotape to repair.
My only issue is that the twills are on top of my wardrobe and the boxes are heavy and want to fall on my head as I pull them down... and I am worried about moths.

So this weekend I think I will find a single plastic box that can sit on the wardrobe floor, and give all my twills a week in the freezer, where the cashmeres and mousselines are currently hiding.
Anyone have any suggestions for moths? Cedar, lavender, and other drugstore options aren't cutting it. As long as I can keep poison away from the cats, I'm open to anything. Google keeps giving me "natural options" - apparently my search for "non-natural moth killer poison KILL KILL KILL" doesn't compute for them...