Yup, A&P and Dark Night.
If you don't have a good teacher who will help on this retreat, definitely read up on all the nanas again, even memorize them if you can. You will probably find times when you feel very emotional or stuck. Don't beat your head against a wall. Take a gentle step back and ask "what's going on here". Chances are you will say oh I'm...
Achy and feeling like crap - three characteristics
Vibrating, lucid dreaming, seeing lights, feeling energy... or just kinda buzzy and manic and wierdly spiritual/religious -- A&P
exhausted, indifferent and ignoring things - dissolution
Afraid and terrified of what could happen if energy problems happen again - fear
Sad and disillusioned with practice and the world - misery
Angry and frustrated with how things work - disgust
I just want to practice correctly and get this done, maybe I'll switch practices - desire for deliverance
I don't know what the heck is happening, I just try to investigate and it's all noise, I try to make things calm and I can't, everything thing I thought I fixed is broken again, I don't know what to do anymore, I probably shouldn't have gone on this retreat, there is no way I can accomplish anything with the time left, this retreat isn't for me, I should have gone to a workshop or on vacation, maybe I should do therapy or just go back to doing yoga, I still have some time left if I quit now and... fuck it, I'm out of here - reobservation.
That's it, I give up, I don't care anymore. I'm just going to walk and sit, but I'm not going to meditate anymore - early EQ
This isn't so bad, I can just sit and walk, I can do this, and I'm learning a lot about myself and how reactive I am - mid EQ
This isn't even like being on retreat, it's sort of like daydreaming or being lazy and sunbathing and feeling good, I'm not even sure if this is right but it doesn't feel wrong, suffering really is caused by clinging, that's so clear now, even clinging to thoughts and sensations, this is so wierd and dreamy, who is even thinking these thoughts?, that's so strange - high EQ
I'm not even sure if this is a dream or if I'm awake, maybe I'll watch my thoughts while I sleep, I? what is I?, thoughts? what are thoughts?, what really does happen in sleep, sleepy, sleepy... --- sharp inbreath --- huh? That might be it. - maybe Stream Entry, maybe a near miss
Note: you won't know if it is SE or a near miss for days sometimes. So keep practicing even if you are sure you have become an arhat on retreat.

Keep noticing the sensations of breathing, keep noting -- whatever your method is.
Being in a nana is fine, even if it is a dark night nana. The dark night nanas have lessons to teach. You have to notice what is going on, see sensations as sensations, attraction/aversion/indifference as a/a/i, emotions as emotions, thought as thought. Don't rush to get out of a nana, but go deep, investigate, learn. Really experience the nana. If you want to go "past" it, go deep into it, go "through" it. Use the maps if you feel overwhelmed and need some objectivity. The nanas will present what they need to in order for you to see how you cling to different emotional states, rather than seeing them objectively as mind states. Learn each nana.
If someone is doing a retreat without access to a good teacher, they should write up their own "quick notes" for how the nanas might present on their retreat. What are the things that create, dissolution, fear, disgust, misery, desire for deliverance, what are your classic triggers/reobservation, what does ease feel like/EQ? Even if things present differently, this little bit of studying before the test can help!

There is no need to judge whether every little tickle of a sensation in a nana. Maybe check in during each meal time and figure out where you are. 3 or 4 times a day is probably a good number of check-ins. That said, you might be tempted to spend all your time mapping instead of investigating sensations. You might be tempted to think all the time about practice. NOTE THOSE BEHAVIORS, NOTE THOSE THOUGHTS!!! "Oh, mapping thought." "Oh, practice thought." "Oh, mapping thought again..."
Remember it doesn't matter if any thought or sensation comes up 1,000,000,000,000,000 times. It's not a problem. Just note it. If you get sick of noting the same thing over and over again, note "sick" or "sick of repeating notes".

And start again.
Best wishes!