VBR Backup best practises/strategies

Hi all,
Our customer is currently running vbr full backups locally, they later use netbackup to store their backups.
They want to have a retention policy of one year and want to have some feedback from other Vertica customers regarding their backup/restore strategies.
How do other customers manage their backups? What are the best practices to meet such
requirements?
Any feedback/suggestions will be appreciated,
Thanks
Chaima