Steve,
I have basically the same system you mention with the bags. I will add that I have only 12" droppers and have actually experimented with them only being 6" on some of my lines and testing them with my dog Buck. He has NO issues with going over the lines. I hear constantly guys are worried about that and then drop them like 18" to 24" or more, this leads to tangles IMHO and there are some that do even further thinking they will DRIVE the boat through the decoys. This is inconceivable to me since my fear of wrapping line and screwing up my way home is pre-eminent in my mind.
Anyhow, if you go about 1-2 feet after the end decoy, tie a bowline knot and then have your weights on droppers with a long line clip on the end of it to snatch the loop you will have even less tangles.
I agree with tucking all the excess cord in EACH pocket with THAT decoy. Also, stiffer line in opinion is nicer than limp line. I have 120#tarred line but truly wish it was 1/4 diamond braid.
Finally, I buy all my bags from the link below. I know others like Dianna's bags, or Dave's bags, or....but I can assure you that after 4 years my bags have seen a lot of hunting and they are no worse for the wear. I can stuff all my oversized cork/wooden Cans into them or a doz GHG Redheads in them no problem. Not sure about oversized Eiders though, but I don't hunt them too often in Green Bay.
http://www.bagdepot.com/hunting_final/hg8/hg_282.htm
item HG-282
$28.95, mallard green, tan, or brown.
you will notice the price is pretty sweet.
I have also seen the leaf bags deal of Pete McMiller and also Andrew Holley's systems and I will say the short droppers again make a lot of sense, along with DON'T grab the droppers, just the main line and they will almost always work out.
I have seen Scott Wisnewski's (Doctari on the web) system as well, and it is basically the same as the leaf bag except he uses the huge avery bags with NO mesh (I think they are like 70/bag though) and the HUGE Toledo decoys. He can get 18 per bag, tight putting them in, but never tangles. He mentioned smaller decoys though is a problem since they shift around in transport and he feels the key to his system is the size of the decoy and the fit in the bag.