get a fake leaf vine or two to put in there and clutter up the tank.
two identical cave-like (one opening) hides is SOP (standard operating procedure) for beeps. half-log hides don't provide the best security for the snake. i'd get two more hides that are identical and cave-like and place them in there amongst your other hides.
cover the remaining two sides with dark paper or fabric.
you seemed like you were questioning your CHE. is it regulated? have you let it run and monitored temps?