I have never seen any documents about DR that are specific to Backup Exec.
You obviously already have an idea in your head about what you want to do. Your idea of having a second Backup Exec server on a secondary site is an acceptable one, however I'd say don't think about moving the tapes there when you have a disaster - you need to move them off-site before you have your disaster!
Replicating catalogs is something that theoretically should work, and I have proposed to have in Backup Exec before (years ago!), but it's not an official method of operation for Backup Exec, so I doubt Symantec would support it.
Tape imports and catalogs may be alright for you if you can accept the time it takes to do them (I assume you wouldn't catalog each tape as it went off-site). I assume you're talking about a timescale in the region of days to recover from a disaster. If you wanted shorter timescales, I'd be thinking more along the lines of high availability (clustering) and/or replication.