Geckos are pretty good climbers, there's no need to worry about that I have a fake tree in my tank and even when you see that they tried to stand up against the glass and their front legs slipped and now they're dangling there, you figure they're gonna fall, but they're so graceful about using their back legs and tail to slide down that they never hurt themselves.
Its for my juvenile leopard. I thought about some plants. But this one is in a 10 gallon so I didn't want to clutter up her space any more. I have those detailed steps because Mathew K. wanted me to do a DIY for Gecko Times. So sighn up to recieve updates, link below. He said it would be a few weeks before he got it formatted to get it out. Thanks for all the great replies!