"Can the iPad smartcover magnets destroy my credit cards?"に関する回答it is impossible to wipe a card with the magnets of the ipad/smart cover. wiping cards with magnets was tested on the show "mythbusters" and they tried with extremely powerful electronic magnets, and didnt manage to wipe a card, i wouldnt be worried, at all.
"Can I dismantle the camera on it!?"に関する回答Won't work, most likely. the wires would have too much of a resistance, my guess.