I bag a lot of my moisture-sensitive orchids when I have to be out of town for a week or more, so far I've observed no ill effects. The ones that aren't bagged tend to fare worse, especially with the drying central heat going this time of year. I usually leave the bags open slightly to allow gas exchange, and I pull them back from the windows so they don't cook when the sun gets bright. Hope this helps!
Oh, and I like your Lepanthes a lot, too, nice growing!
--Nat
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