Have not hung pots over the bed yet, but I did give my Vandas the orchid spa treatment the last couple of cool nights. They 'hung out' in my DH's shower, which has south-facing french doors for some strange reason. This time of year they let in great light! And I can use the shower head to douse the orchids, with warm water, too. I really haven't felt the need for a permanent greenhouse here, but I do spread around a lot of frost cloth when the nights get into the 40's. I have a large frost cloth 'tent' that rolls up, to cover my big plant stand where my Earth Boxes are, and a lot of my tender tropicals go under there on cold nights, too. Our coldest night so far was 54deg.
That's an awesome, huge greenhouse Paula. You can really feed your plant addiction now!