It sounds like your system has found dreams as a good way to 'conference'. If you don't feel that is working, can you work on asking them to meet you before you doze off? I ask in case you are waking up not feeling as if you had good sleep....
My son's alters came to him as nightmares...they say they were trying to 'teach him' something, to get his attention. They still do a lot at bedtime or while he sleeps. We've talked about how that just happens to be the 'best time' for them. They are in private, there are no distractions, and - for his system - the two Little Ones have gone to sleep so they don't have to worry about their hearing 'grown up' talk...
He was waking up just tired though after a few long talks...and so he's working at having those conscious (go inside to catch up with everyone) 'conferences' at least twice a day. In the morning and in the evening and, if needed, mid-day...it's just a "hey, how is everyone? Did anything come up you wanted to talk about?)
Also, in the medium between nightmares and this co-consciousness - they also had a point of external (hallucinations) where the one who wanted to talk to my son or relay something to me or the T - my son would see in the room and listen and speak to him that way. I think it helped him to 'see' him outside for a conversation and also helped me and T to tell who was talking/when...
Just our experience.