Hi Fully restored,
You are onto something here (the garbage). I thought this part, “My husband and I had gotten in an argument over the trash being taken out at mom and dads. I felt unappreciated”, was not part of the dream but a real-life incident before the dream. If it was part of the dream then you are right. I think you are right about the girls also (both scenarios seem possible). The Julie Garland part and the pills speak of under the influence of other people leading to either ignorance (sleep) or a false sense of not being ignorant (pill to keep awake).
There must be something about your cousin that is symbolic in this dream.