Most notebook power adapters these days will work in both 110v and 220v/240v environments. You will potentially need a plug converter to mate the plug to the foreign outlet however.
On the back of your Apple power brick should be the listed/supported voltage ranges.
As far as the camera goes, you may find the same thing, though probably will need a transformer to ensure safe charging. For a camera, I'd imagine it wouldn't have to be too beefy a transformer.
Buy them here, as overseas, on location, they tend to rip you off.
Also, depending on where she is travelling, some hotels offer both 220/240v outlets and North American style outlets... there's a numeric code for the type... beats me what that is. ie; the Raffles in Singapore offers traditional american type 110v outlets in one area of the hotel room for their guests.
Have her call the hotels and check.