What about using the RPi Camera Module? I am not sure how much power that consumes compared to your usb camera. If you do wanna check out the RPi Camera Module, then you can have a look at the documentation [here][1] to see if its something that fits your needs. 

If you still are considering USB hubs, then you can see a list [here][2] with RPi-working usb hubs with power ratings.

**Additional info:**

- Model A ratings: 300mA. Model B ratings: 700mA. ([Reference-A][3], [Reference-B][4])

- The RPi + camera draws about 260 mA more current when recording video, than without the camera. The Model B is about 550 mA by itself, so camera use pushes it over 800 mA. ([Reference][5])

- Nearly 300 mA for the camera module alone ([Reference][6])

- To save ~2-20 mA on the RPi Camera Module, you can turn off the red led ([Reference][7])

- If you want a simple way of measuring how much power a USB device is using, you can buy [THIS][8] device with free shipping. (5,99USD)


  [1]: http://www.raspberrypi.org/wp-content/uploads/2013/07/RaspiCam-Documentation.pdf
  [2]: http://elinux.org/RPi_Powered_USB_Hubs
  [3]: http://en.wikipedia.org/wiki/Raspberry_Pi
  [4]: http://www.raspberrypi.org/archives/260
  [5]: http://elinux.org/Rpi_Camera_Module
  [6]: http://paulscomputernotes.blogspot.com/2013/05/camera-module-not-happy-on-overclocked.html
  [7]: http://www.raspberrypi-spy.co.uk/2013/05/how-to-disable-the-red-led-on-the-pi-camera-module/
  [8]: http://dx.com/p/usb-av-usb-power-current-voltage-tester-translucent-blue-silver-235090