Macbook 15 Retina Bootcamp Windows 7 64bit

When I go through the bootcamp process, then get to the windows 7 setup screen. I format the bootcamp partition like the instructions say, then click next with that highlighted and get the error:

Setup was unable to create a new system partition or locate an existing system partition.  See the Setup log files for more information.

I'm on a 15" Macbook Retina. I do NOT have any: External Drives, other USB Drives plugged in.

The only thing I have plugged in is the USB with the Windows 7 Setup files.

I had this same issue when trying to install windows 7 via usb on my Desktop (moving to a SSD) but I was able to go around that issue by just installing from the current installation on the HD. Obviously I can't do that here.

Do I need a specific kind of USB stick? or what should I look for?

Update Checking the logs from the command prompt I see a bunch of errors: Couldn't find boot disk on the bios based computer

I believe since my USB stick is capped at 480mb/s (based on the sys info) I'm using a USB2 stick and I've swapped sides.

Lots of potential gotchas are mentioned here: https://discussions.apple.com/thread/3259726?start=0&tstart=0

Including the type of stick (USB 2.0 vs. USB 3.0), the port its plugged into, etc.