Compact Flash? I didn't think they made those any more?
I'm not 100% certain about how to use them with iOS, but you can get something called an OTG cable (On The Go) that allows you to use USB drives and some devices with your iPad or iPhone. I think you may need to jailbreak it to use one though- I think that was the problem my father had with his iPad and an OTG cable, but I'm not sure.
Basically the cable plugs into the charging/sync port of your device and has a USB plug on the other end that you can plug a portable hard drive, flash drive etc into. I would consider getting an OTG cable and a portable CF card reader, both of which should be available for a couple of bucks on eBay.
Def