This is a pretty good technique. This seems similar to dream incubation, but the dream you're incubating is the last one.

I don't know. Did the dream behave the same way as it did last time? For example, were the same DCs from the last one doing the same things as they were from the last one? If what I'm thinking is right, the only thing that should be the same is the general location of the dream. Then again, I've never tried this, but I'll be sure to try.

Good stuff.