Hello Levi, that's an interesting idea. Actually you have made me think of another connection between quantum ideas and lucid dreaming.
If the many worlds hypothesis is correct the splitting into multiverses would be true of dreams as well of waking realities since quantum splitting of pathways would occur in the sleeping brain too.
In each multiverse in which a version of you exists, your brain also generates a new alternative sub-universe each time a dream could go in a different direction, due to random electrochemical 'decisions'. Each then splits off into a further infinite series of dream multiverses Since your brain obeys the same laws of QM as any other electrical 'device' .Therefore in each single 'waking'universe there is a further subset of your own infinite dream universes ' and the same applies to me too. As in any infinite series every possible combination must of necessity occur then it would follow that in one of the dream multiverses you appear in my dream and I appear in yours as you suggest.
So perhaps the people who 'meet 'every night in LDs at the 'Crossroads' website are not so crazy after all!