Hello Coldwarvet23a,
Thanks for using Apple Support Communities.
I see that you're getting the pop-up message encouraging you to back up your iPad to iCloud, given it has been a few weeks since your previous backup. While there's no setting to disable that alert, you can selectively force your iPad to back up to iCloud by turning off iCloud Backup, and then when you're connected to a Wi-Fi network you can turn it back on and Back Up Now.
You can set your iOS device to back up automatically each day with iCloud. iCloud makes these daily automatic backups only if:
You can also make a backup of your device manually:
- Connect your device to a power source.
- Connect your device to a Wi-Fi network.
- In iOS 8, tap Settings > iCloud > Backup and tap Back Up Now. In iOS 7, tap Settings > iCloud > Storage & Backup and tap Back Up Now.
Get help backing up your device in iCloud
Alternatively, you can disable the iCloud Backup option as a whole, and back up your iPad by using iTunes instead.
How to back up your devices using iCloud or iTunes
Cheers.