Sounds like you had a decent day at the beach with the kids and the W?
After having gone to a couple mediation meetings myself now, I can tell you I was completely apprehensive at first. However, during the meeting, the mediator was very fair, and I felt better after coming out of it, though it was very emotional.
One thing my L told me, was to state up front, and make the mediator aware, that I was not in agreement with getting a D, and that I still had feelings for my W and M, and that I felt at a disadvantage in this situation. This was to ensure that my W did not try to take over mediation with her agenda. My L told me any mediator that was good, would note that, and try and ensure that both parties views were heard.
M: 41 STBXW: 41 D: 9 Bomb: 4/26/09
On board the D train now..
"Suffering is when we try to change what we cannot."