Things to gather now

Banners
Paint
Banner material (sheets, cloth, discarded banners, etc)
Poles – bamboo, PVC, wood, etc
5 Gallon buckets
Bike tubes

Things to bring to Chicago

Lots of food (semi/non perishable)
Extra clothes
Banners
Bucket drums

(note: medics, copwatch, and other affinity groups have their own working lists of supplies they specifically need)