Bad Shed-Help

That set up would be ideal because I do have a screen top but I use lamps. One thats 100W (?) white light for day onoly and the second one is 25W Purple light for night. I understand they don't need a day/light cycle and lamps are hard on humidity...but this is what i bought before I heard that and I really don't have the $$ to go buy UTH etc etc....

Unless a stronger 75w red/purple light would be able to warm the whole tank...then I'd be able to only use one lamp....

Ideas?

I just use a tupperware container with a lid, fill about 1/2 inch of water, stick snake in, then close the lid partially (I leave a corner not secured for air).

I'd not be worried about aggression it is not super common for royals to be aggressive. I do exactly the same as described but I use a dry (DRY towel not wet, wet towels don't allow for air flow) towel over the top so it is dark typically Royals feel safer in the dark.

Humid hides are going to be the easiest for you just a container with some damp moss and an opening and you have solved the problem for the next time.

The drip trays for flower pots work super well I like the ceramic ones you can soak them in water for an hour or so and they increase the humidity quite a lot under them. I used to use two one with a hole chipped in in and one on top filled partially with water. If both are uncoated they will drip water from the top to be absorbed by the bottom and it is self regulating somewhat.