Honestly, I would bug bomb the room. You aren't going to be able to get at the back areas and do thorough checks. That's going to be a huge challenge on this one if you get spider mites. I mean, a nearly impossible fight and with everything cramped and touching you'll have them everywhere before you have a chance to do shit about it. Late in flower is not the time to be bug bombing and you'll have just a ridiculous all out war against those fuckers every single day.
With big, wet, moist buds under a nice warm light, you're also going to have humidity problems later in flower. Bud rot will be your enemy. I've grown some packed in plants like that, lost one whole batch to budrot in the early years. I lost my very first grow to budrot for the exact same reason, haven't made that $50 mistake since (dehumidifier).
Your grow looks good, you'll be really happy with the results, I just hate to see a great first grow like this turn out bad later.