high humidity won't actually hurt the plants. When was the last time you saw an mid atlantic state that had a low humidity summer? Humidity will not negatively effect the vft. I have all mine outside in N. VA and it is humid as all get out up here right now. 90%+ much of the time, and it will be like that more times then not over the summer. One thing that you need to find out is what works for you, not someone else. I know that this is weird and a bit hard once you start out, but it proves to be invaluable. Actually planting the plants in the terrarium may not be the best route to go. You can do it, but it seems to be more work. Tamlin recommended to me to make for more room and use of my lights, to turn the terrarium on its side. This way the plants are closer to the lights and you have more room. Now, you'll do this with the plants still potted. It also allows for removal for whatever reason of the plant if something goes wrong or you want to try something. Hope this helps.