Check the phone coverage of the area you will be in. Will your phone/dongle work where you will be photographing? Read and pack a copy of the Street Photographers Guide. This will help you understand your rights while taking photographs.
Work out with your buddy how you plan to work together.
Does your buddy know the software you plan to use
Your buddy’s job is to assist you while photographing so you can get as many good shots as circumstances will allow. Discuss with your buddy what your expectations are and vice versa. This will make for smooth running at the action.
Some of the jobs you might want your buddy to do are listed.
As soon as everything is in place, get key shots–you never know how long you will have before you aren’t able to photograph anymore (police move you on, etc.)
(have another memory card in the camera so you can continue to shoot)
JPG, resize to 1500px across, SRGB, high quality compression
choose key shots and send them to media team-cut it back to around 6 images
keep shooting when police/police rescue arrive (shoot as much as possible before they get a chance to tell you to stop shooting. But try to remain discreet.)
upload second lot of photos after police presence after re-send another 6 or so to media team again.