A few thoughts for future, or for other people reading this thread:
I took straw like beach mats (think beach towel only you can shake the sand off) and wrapped those around the Xpens for a sense of security so they don't get freaked out by the sensory overload factor of all the junk piled up everywhere.
Chickens are not going to get freaked out by a sensory overload if the junk is just sitting in piles and not moving. If it were moving, they would be concerned about it eating them or falling on them, not about sensory overload then either.
I'll also bring in their favorite stool from the run - it's familiar and will give them a place to perch.
A place to perch is fine, but "familiar" is not going to matter much in this situation.
Here is my biggest concern of all -- the orpington and astralorp - both 5 months old, sort of go at each other, the BO chases the BA who spends her time running away...
I'm concerned with the extreme confinement, someone is really going to get hurt. I've never seen a chicken fight but I guess I'll take the actual dog crate for our dog away from him and isolate a chicken in it if needed.
You will probably not see anything that looks like a fight. You might see one cowering in the corner. The aggressor might be picking at her, or might just keep her away from the food and water. If that happens, separating is definitely the thing to do.
When you do not have enough space for them to get away from each other, sometimes it is better to just give them individual spaces, even if those spaces are small.
For example, look at the cages used at chicken shows. Here's a page with photos:
https://www.hobbyfarms.com/show-tell-a-guide-to-entering-poultry-shows/
Those chickens cannot hurt each other, will not get lonesome, and do have all their physical needs met. They may not be entirely happy, but they will be completely safe for however many days the show lasts.
Putting chickens in individual cat or dog crates is one way to get a similar effect in an emergency situation like yours.
I wish there was a chicken anxiety drug I could give them to chill them out.
I would not expect to need any drugs. You see this as a major hurricane and a big disruption. For a chicken, it will be about the same as being moved to a new home and quarantined after the move, or taken to a show or to a vet, or being put in a cage for observation with a medical condition, or many other things that we would expect them to be able to tolerate pretty well.
2) They will have no tip dog bowls inside the coop with food and water. Is there anything I can add to the water, i.e. essential oil of any kind or anything else to help with the stress level during the storm, which will last about 18 hours in terms of heavy rain and wind.
I would just provide their normal food and water. You will probably be more stressed than they will be. And if they are stressed, an unfamiliar flavor might cause them to avoid the water, which can cause new problems (dehydration).