I'd vote for moving the beds back together. There will be other opportunities to let her move to her own bed on a more permanent basis.
Some things you said ("DH and I fitfully go to sleep", "I want the family bed", "DH feels sad", etc) really would indicate to me that you, as a family, are not ready for this kind of separation.
I'd go back to what I know works best for our family. Like I said, there will be other chances to encourage the separation.
Ann-Marita. I deleted my usual signature due to, oh, wait, if I say why, that might give too much away.