Or trust the online iCloud Backup.
Whilst setting up the iPad, choose the secondary iCloud Account.
Afterwards, goto Settings > iTunes & App Stores and change the Account to purchase Apps manually to the primary iCloud Account.
Use the secondary iCloud account to sync
In Settings > Mail, Contacts, Calendard > Add Account... choose Other > Add CalDAV Account.
In order to sync more than one calendar, head over to this site to customize your sync settings.
Brightness & Wallpaper turn off Auto-BrightnessiCloud > Storage & Backup > Manage Storage > $DeviceName disable Camera Roll BackupsNotifications > Outbank disable Badge Icon, Sounds and Lock ScreenDo Not Disturb enable Silence: Always