I use the Nexus 7 but had to root it to use the OTG. Then with StickMount and a simple file manager I copy the CF contents across with a card reader plus OTG cable. I find it fails a bit though - presumably files have been copied so I take out the cable, only later to find the last 2-3 files to be empty. Mostly happens with copy, not move, and not always. Still working out when and why, quite annoying. Shoot raw+jpeg. I move from CF to Nexus, so normally no problem there. Then copy jpegs to small USB for backup - this is the bit that sometimes fails. Then move raw+jpeg to big USB, usually OK.
Not sure why I have to root the Nexus for proper OTG, maybe there is an easier way. Tried synching but the simple app I used only copied jpegs, not raw.
If you have SD there are some cool cards (though not amazingly fast) which double up as USB, so no need for card reader.