m0useanswered grow question 8 months ago 48hr darkness is myth, The plants need energy + time to produce more trichomes and they get none in the dark with no light to photosynthesize, they don't just magically pop off.
I used to do this but I thought it was more for terpene preservation but this did not have an effect on that. Terps will evaporate in higher heat environments so when you open the tent as its been cold for a day or so its why they smell more vs when lights are on. terps also can not be reproduced in dark periods. so extra long dark period just allows for more off gassing them, its also why you want to dry in a room that is colder to prevent all the tasty smells from going away. Plus if the RH is not in check that dark period could be a good time for molds to bloom.
If all of that does not matter and you still want to toss em in the dark for 48hrs. then do it, its not going to hurt anything if your environment is in check.
I like dry trimming but for wet trim give the plants a nice water 2 days before chop. nothing worse them trimming limp leaves.
Good Luck!