I would be worried about watering before I put the plant in for 48 hrs. +. I know at my place PM would spread on some strains. Plus, I would take terpenes before THC, personally. I think taking them just before lights on would be the best, but I haven’t noticed anything from the times I tried it.
Mold, on the other hand, might be a problem if you already live in a humid environment. I’d be afraid to put a plant of real fat, leafy buds, into the dark for a few days.