From my experience, if you stop journaling your recall will fade. I too could remember 4+ very elaborate dreams a night. I was spending 30-45 min every morning writing them down, still leaving a lot of detail out. Then I thought I didn't need to do it anymore since I was just that good. One thing led to another and next thing I know I am not remembering any dreams anymore.

Well, now I am just starting to journal again and getting some recall back but it is much more difficult this time around.