I have been wanting to try this as well but my dreams are often pretty incoherent. However I have visited a few places multiple times before in my dreams, both lucid and non-lucid, but I haven't really made en effort for that to happen, it just kinda does. There is a dream character that I have talked to multiple times - my subconscious, and also there is a girl that has appeared in maybe 2-3 of my dreams. I would like to take this further and have a more coherent world in my dreams where I can recognise the places and really get to know the characters well.