I have an adwords account with several campaigns in it. Each campaign represents a different client. One client wants access to the adwords campaign so he can watch what's going on and how his money is being spent. How can I invite someone to view - not the whole account - but a single campaign. The invite function under account setting appears to invite them to the entire account. Or should I have things set up differently?
You should have each client set up in their own account and link them through your MCC. More info here: http://adwords.google.com/support/bin/answer.py?hl=en&answer=7725