Swivels are a must, and I believe you can never have enough of them. Should be swiveled points at the trap, in the chain or other connection length itself, and at the attachment point. Coons roll, twist, grab with all four feet, etc. and it is amazing the strength they have for their size. They also have tough, rubbery feet, that are tapered with not much of a "wrist" or "ankle" area per se. They can also rotate their back feet 180 degrees backward, a feature that enables them to climb so well, even up straight trees by the bark only.
Swivels are essential in coon trapping.
I too tend to shy away from jumps these days. Hope that statement doesn't ruffle any feathers. If the #1s you have are still strong-springed, and the jaws are either double or are singles that close completely with little to no gap in the jaws when the levers lock up, those #1s are just fine for coon, and especially on drowners. The #2 longs will also work well on drowners, and for a back foot catch would hold well. I use a lot of #2 longs on land here for coyote, fox, and cat and they hold just fine. They have a similar jawspread to the 1 1/2 coil, which has been a standard coon trap on the water line for many, many years. Use lots of swivels on them, and I also cut that spring clevis attachment off completely and go to a mid-frame attachment point. I never had good success with a spring attachment on longspring models...center mounted swiveled chain attachments are the way to go, especially with coon.
Jim