NOOB QUESTION - how to schedule nightly tape backups that are taken off-site the following morning

Well one way to get to auto eject the tape is to buy VAULT (add on to netbackup - cost to much for just one tape).

I also have a TS3310.

Just log into the console and eject the tape that was written to last night

(look at your jobs, or look at time assigend on the media, or look at the Tape Written report)

and eject the tape ( yes a manual thing).

or get fancy and write a script to figure out what tapes were written to and eject it with commands in your script.