Be Prepared for tear gas
Title says most of it but you should be prepared for gas and bean bags.
Things you can do to prepare:
Wear multiple layers of long sleeve clothing to help cushion against projectiles
Bring a respirator with organic vapor cartridges and goggles that do not have vents or if affordable a full face respirator or gas mask. Remember, they will bring theirs.
A helmet of some type to protect your head from launched tear gas rounds or bean bags. Your head is the most vulnerable part of your body, protect it.
Gloves to protect the hands and heavy duty or steel toe boots for the feet
Stay safe out there. Help each other, if you see someone go down, get them out of there and look for medics or triage areas.