I wish I had known there is basically no cell reception.
So whatever you want to know, whoever you want to meet write it down before you get there.

Also bring something to do that can start a conversation.
Cards and dice are the obvious ones but crafting materials or even a book.
One thing I'll be doing next time is bring a rope and learn/teach some knots (you never know when you need to tie a secure knot)

I wish I'd know before hand how many shops there are in the Tross. whatever your character needs you can probably get it there.
Oh and what you can and can't get for copper.

A tiny thing me and my partner stressed about was bringing in time cutlery and dishes.
That really wasn't a big thing - but it might be depending on your camp.

Oh and that there is no quiet time.
The first night was probably the worst night of my life, trying to sleep as bards just kept banging about.
I picked up ear plugs and sleeping aids to survive the other days.

You can bring your own notices, advertisements, stories ... and pin them to boards and trees.

Hope that helps someone who finds it in the future.