I should post an update. I've been incommunicado recently as I had to rebuild my workstation.
The first session was very scrappy. It suffered from my insufficiently internalising all the people and locations so when the players decided to go to a certain place I had to scrabble through the paperwork to find out what and who were there.
In subsequent sessions I knew where the players were so I could mug up on that particular part of the material.
While we know the map is not our friend in combats I think a map of the festival would be a nice prop. Something for the PCs to be given when they arrive or when they visit the information desk. In a sandbox game it's sometimes nice to have a menu of places to visit and it adds a little immersion.
We did discover one oddity in the rules. If you have an Archer in a group which is otherwise only melee characters there is a way to read the Archer's schticks such that they do -1 (i.e. they heal a point) of damage with each successful strike. Obviously we went with the default damage of a bow and later on one of the other characters acquired themselves a Tokarev. There's nothing which says they have to be using it for the Archer to get their damage bonus.
The Thief did their thiefy thing and found out everything there was to find out from the administration centre without raising an eyebrow.
I slightly flubbed the "flight of the student" chase. I thought the whole combat seemed a bit mook light. What I had missed was that it isn't one mook per 2 characters but one truck full of mooks per 2 characters.
Still there were more than enough named characters, none of whom the players wanted to interrogate so I suppose they will have to find out about the ghosts and things from somewhere else. I should have probably telegraphed that the possibility existed by having them groaning and clutching their various bits in pain.
I too decided that Pork Chop's bonus should probably be elucidated on the first melee attack. It's what made sense. My players loved the image of the mutton-choped villain called Pork Chops".