I was just about to suggest the fake vine, but you got it. I think it looks good.
I created a natural enclosure, similar to what you have there, for neonate Trioceros Jacksonii Xantholophus. But, they did not live through birth, and I now use it for my male Furcifer Verrucosus. I like the Exo-Terras better, than using screen, or in you case, an aquarium, because I feel the holes are put in the location they are because it gives it optimal ventilation. They are great for regulating humidity, and these are perfect.
Although they hold mositure well, one thing you need to make sure of is the fact that the substrate needs to stay moist. If allowed to dry up some, it will make the humidity hard to control. What I do, is once a week, I water it, and allow it to absorb the water. I mist the enclosure twice a day, for about 30 seconds to about a minute each misting. So, it normally is moist enough to do its job.
LPR08