As of right now we have a couple facebook apps(different one for each client), all of which use extended user tokens to access insights data of campaigns and adsets.
Is there a way to get permanent access to campaign's insights information with a token that never expires? If not, should we just make a dashboard and nag-mail that makes us manually generate new tokens, or is there a way to generate new token and extend it programmatically?
You can exchange your token for a permanent one, just go to this url :
https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&client_id=[APP_ID]&client_secret=[APP_SECRET]&fb_exchange_token=[TOKEN]
It will return a permanent token (until user revokes the application or change his FB password) and a "expires" value, but it's a permanent one, you can verify it's a permanent one by using the token debugger : https://developers.facebook.com/tools/debug/accesstoken/