Hi Nicole, we struggled too. We ended up putting a toddler gate on Beth's door and we would go in later and put her in her bed. I figured we couldn't make her sleep but we could minimise stimulation. Even now sometimes she will look at books behind her curtain and put herself to bed a little while later, but she always starts off in bed.
Not looking forward to the day we put jordy in her bottom bunk though - for now he goes down in his cot fuss free.
GL