Just a thought, but if you are shooting exclusively in RAW format, are you sure you want to be using your iPod for portable storage? Raw files are huge and while the iPods are plenty big enough for lots of songs, RAW digital photos are going to eat up drive space quickly.
You might look into a separate portable storage solution for your camera. For example, if you search for external drives and drive enclosures that support "On The Go" (OTG), you will find a lot of options. Basically OTG are drives that in OTG mode will act as the USB host and will transfer the contents of any device hooked to its USB port that conforms to the mass storage device specification. This typically includes most Digital cameras, Flash/Thumb drives, other drives, etc.
In a nut shell, you hook up your camera to the OTG drive or hook up a card reader to the OTG drive with your Canon's card in it, hit the button on the drive, and the OTG drive will then read in and store everything it sees on the other device. The simplest ones are simply drives so you have no way of seeing your photos but is a good way to carry around a lot of extra storage space to store your photos until you can get to a computer. As which point these devices hook up to the computer just like a normal external drive and you can access all your photos.
Patrick