I'll just be bringing three lenses:
85mm 1.4 - for possible street candid photography.
24-70mm - for most of the shots of the day.
16-35mm - if I need anything wider.
- A sturdy tripod, or at least some way of holding the camera is essential.
- Warm clothes!!!!
I'll bring all of the my filters along, they don't take up much space. You're welcome to try some, if they fit your lenses, but all of my filters are 77mm thread size.
Worst case, you can just hold it over the lens
Get an idea of what sort of shots you want to get too, just browse on flickr for inspiration (that's what I did). Just hope the weather is kind!!