nervous wreck- mediation with the douchebags

Sorry i haven't updated in a while. With the garden, canning, baby, and doing some private classes I barely even have time to stalk y'all.
Tomorrow we have a meeting with a mediator, our landlord, and our douchebag neighbours. The same douchebags who were trying to get the landlord to kick us out when i was nine months pregnant. One of these douchebags is the owner of a dog that bit my husband, and still runs free daily (allbeit for a short period of time) in the walled in garden that we have to walk through to enter and leave our house.

Anyway it's complicated but it boils down to: we want the chief douchebag to put his yippy biting dogs on a leash and take them to the street to do their business for the FIVE MINUTES a day that he takes them out of the chicken coop to piss and shit, We don't want any of the douchebags to go through our porch to get to the garden (they can go around the house instead), and we sure as hell don't want those douchebags to have a key to our storage space even if the water meters are there. The douchebags want everything with the dogs to stay just the way it is, our porch to be unlocked so they can walk through it any time they want to get to the garden (and all of our stuff out of it), and all of our stuff out of our storage space so they can marvel at the power they have to empty out a giant room just because there are water meters there.
I want to be optimistic that this mediator will help us to find an acceptable compromise in which everyone can go back to pretending that the others don't exist, but it's hard for me to imagine these douchebags compromising. They're these old rich people who seem to believe that being old and rich gives them the right to leave their dogshit wherever they want, and not even apologize when their dog bites someone. They talk to me like I'm a 3 year old child just because I'm young, foreign and have an accent.
I shouldn't be nervous because my lawyer assures me that this mediation is totally not mandatory, we don't have to agree to anything we don't AGREE TO or even take any shit. He said that if the mediator lets the neighbours get in our faces and be douchebags or seems to be partial to their side we can just walk out. He'll take the case to court for us in exchange for private english classes if it doesn't work out.
I just don't want to even have to talk to or look at the faces of these old withered, bitter, condescending bitches. Why do they have to push it? Why can't we just pretend not to see each other until they die (they're all in their 70´s- 80´s), because they have nothing to LOOSE- it's all them trying to mark their territory/superiority/rightness. Douchebags.
The important thing that i have to remember is: I'm a young hip happy mama with a great family and if these problems don't get worked out I'll just eventually move and none of it will matter, but their ain't no cure for the serious case of the massengilitis that my neighbours have.