I think he's asking if his current backup procedure is correct such that in case he has to do a restore, his settings, aside from just the photos, are preserved.
To answer the original question, I believe it's yes, your calendars/books/etc will be preserved. If you want to keep everything in tact, I'd also recommend backing up the preference file stored in Library/Preferences/com.apple.iPhoto.plist within your home folder. It's not absolutely necessary, but saves you the hassle of reconfiguring iPhoto.