Is it possible to set up a webcam to a wireless modem without my computer on and be able to access the webcam over the internet? Can you suggest a website that would show me how to do this?

I am planning on attending an event that I would like to broadcast over the internet, but will only have access to a municipal internet connection. Is it possible for me to publish my webcam video to the internet for people to view without having a dedicated router with port forwarding etc?