Thanks everyone!I feel much better now, knowing that I can simplify the procedure... still can't figure out how to store 29 snakes at once (I don't even own that many spare tubs and/or pillowcases), so I'll just do this in segments - one rack at a time. That means I can't treat the room or racks themselves, but it seems you all don't think that's necessary. Hopefully the tub treatments will suffice, if not I'll do a FULL extermination in about a month.
P.S. What do you think about my second question (regarding the poop)? And are you in agreement that it's safe to treat the hatchlings' tubs?