Is there some way to back up my entire campaign, as a safety measure in case Google has a catastrophic failure? I can't find any info on their website. Thanks -
It's possible using the Adwords Editor. Free, simple and also really useful when you want to make mass changes to your campaigns. You can download it straight from Google: http://www.google.com/adwordseditor/ You'll find the Export/'backup' functions in the 'File' menu.