That's odd. For any apps? Do you have backups disabled in your preferences?
If you open Google Drive on your phone, open the left side menu, go to Backups, select a device, and it should show you all of the applications that are backed up, the last date/time of backup, and the size of the backup (doesn't count towards storage quota).
I think the roaming aggremeent will be enough for now.. even offering roaming within city limits is a big deal imo and it looks like it will be treated as native coverage which will improve customer experience.