A note from the 350 team I thought I'd pass along:
You don't necessarily need to camp out to help support this movement. You can also attend the daily general assemblies, take part in discussion groups, donate supplies or money, or put your unique artistic, media, or culinary skills to work. If you've been with 350.org for a while, this open-source approach probably feels familiar. It's more like a potluck where everyone brings a dish than a dinner party with a single host.
Look for an #occupy group near you: