I've got almost 4 years in recovery, and had a "using dream" a couple of weeks ago. I was glad, when I woke up, to realize it was only a dream, and when I thought about the dream, said "blech" and went on with my day. This is the first time I've had one in a while, so I do believe they get rarer as time goes on.
I'm not much into trying to figure out what dreams mean, mostly because I have dreams that make NO sense. However, I was stressed, and I wouldn't doubt that that had something to do with it. To me, it was a good reminder of what I didn't want to go back to.
Hugs and prayers,
Amy