Ok thanks!
They do each have their own hides on the hot side, a small rock for the small snake and a large for the large, and there is a nice large half log on the left cool side. The large snake cannot get into the small rock, and the small snake does actually go in the large rock with the large snake sometimes. it stays the same temp in there, and they don't seem to mind sharing when they do, but I will be looking into getting 2 separate PVC tanks after the holidays.
Also, I was pretty sure the red light would be ok, that's why I bought it lol.