I can't help much with the sky hide thing because I don't do that for BP's but I would say not to do live plants if you aren't doing bioactive. The problem you are going to run into is that every time you replace substrate, you are disrupting the plants, especially roots, and they are likely to easily get knocked over by a big heavy snake and die. With bioactive even, you want to give plants a solid month or two to grow strong roots before you introduce the animal(s). Even an adult crested gecko (much lighter than a BP) can absolutely wreck plants that haven't had time to become established (speaking from experience). If you put REALLY deep substrate, you could put potted plants down into the substrate still in pots, that way removing substrate wouldn't mess up their root structure as bad, but if the substrate isn't deep enough, the snake is going to knock over the pot. I'd save yourself the trouble and wait to do it full bioactive or not at all.