I went to mediation on most of those things you have listed. My attorney said we went to mediation so that when we go to court to have the judge decide that we can tell her/him that we already went to mediation and we are at an impasse.
DO NOT CONCEDE! I have been to mediation 3 times; especially over the kids' schedule because he wanted them more because he didn't want to pay CS! We had to go back because I did not agree.
We took the mediator's notes to court to prove we went and ultimately the judge gave me custodial parent.
If I heard during mediation that WH was not going to accept my terms, I used vague terms like "I guess so" or "maybe".
Be careful, that mediator will push you to agree; not necessarily to what YOU want, but just to agree.
They will say "ADad, now don't you think that sounds better than what you came up with?", etc. Stick to your guns!
Mediators want you to get as much down on paper as possible, but have no real bearing in court.
In the end, you decide what you want and don't want. They take notes and submit them.