Long lines will work Ken. I have the same issue, as you probably know. I like the idea of an H weight, or the circle ones that you have, with a clip on them that you can attach to the decoy. Wrap the weight with 15' and a clip, slam it on the decoy when you get out. I'm still working out a good system. Thankfully most of my puddle duck spots are shallower, but that silty salt marsh mud is always present and a real pain to clean out of everything. Even my truck has a film of it inside it in all the nooks and crannies.
I've had a similar issue with the homer geese I made. No clips. I ended up putting screw eyes on the "bow and stern" of them, and use the clip system previously mentioned for them. It's not perfect but it works.
I spent a lot of time last summer making my long line system modular for the decoys that live in the gunnel bags and not the laundry baskets. A bit wonky to explain, but I can show you next time we're at the same spot. Once you see it used it goes nice and quick. I like things to be simple because long lining solo can be frustrating otherwise.
Side note: I used to gun puddlers in the morning, beach at the launch and swap out bags for sea ducks, but now with the special season closed I'm not sure if that will be routine anymore. Andrea will be happy there are fewer "clam ducks" in the freezer.