Claire, anything that saves you court time is a good thing. Court is EXPENSIVE.
And since you guys aren't together and thus have already demonstrated an inability to come to agreement, building in a plan of action is the only smart thing to do. It's not personal. And not everyone is well-intentioned. I know in my brother's case it's better to assume they WON'T agree than that they will.
I'm sorry you're hitting mediation but it's important to have things clear on both sides and hopefully it will be a low-key event.
Also, I wanted to say earlier... when you were upset at having to yield on parenting stuff to your H, it's so wonderful how involved he wants to be! Consider the alternative.
HUGS!!!
Me42, H40 D12, S8, S7 A revealed: 7/13 Sep 4/14; Agreed to D 1/15