I think my big issue is how to maintain the 90-hot/80-cold temps.

Getting back to basics = My original understanding was that I needed a UTH for the hot side, 2 hides, a water dish, and substrate at minimum.
From what I understood, the UTH would help elevate the hot-side temps and, if needed, CHE or Bulbs could be used as a boost in reaching these temps.
This is what I was working from when setting up the tank.

So with that in mind, I have been using bulbs to get the air temps into the correct zones (my goals are 90-hot, 80-cold) and have not yet stopped using them. I knew the UTH heated the underside glass so as to provide belly-heat, but I thought it also served to heat the hot-side overall. Apparently I was mistaken. Instead of bulbs, I assume ceramic heat emitters would be better for maintaining ambient temps? I know they would help retain higher levels of humidity. I picked up a timer yesterday when I was at Lowes because I thought it would come in handy. Perhaps I could attach it to the CHE and set it to cycle off around 11pm or so, kicking back on around 4am. Then, since they don't produce light, I could just let the natural sunlight coming through the window next to the tank provide the day/night cycle (even though its not much) once I got the correct temps dialed in.

In any case, I have been using a probe to measure the temps of the hides, but I'm nabbing a temp-gun today that should be more accurate and easy to use.

Thoughts?