Personally I think you have done great thus far. I agree that you should feed imports live first and then go to frozen thawed in a few weeks dependent upon each individuals feeding response. 6qt tubs are perfect for hatchlings, I wouldn't change that until they hit about 300-400grams or so. I would worm each, just to be safe. It won't hurt them at all. I would give each a bath with a little "reptile spray" as you said. But from what you have done and are going to do there isn't much to add. You are pretty much taking the proper/exact measures needed for those imports.
I agree worming is a good idea with any import.
Especially since they came in @ low body weight.
Just a few snakes and geckos at the moment.
WARNING:
Unattended children will be given espresso and a free puppy!