yet another pkgng vs. ports management question

[David Newman]

I have recently taken over sysadmin chores for a FreeBSD 9.2 system that
runs ports installed with some combination of default and non-default
options.

I don't know which ports have non-default options set. The person who
set up the system is not available.

For purposes of keeping the system up-to-date, which option is best:

- just run 'pkg update && pkg upgrade'

- just update the ports tree and run 'portmaster -aD'

- some combination of pkg and portmaster

- something else

Thanks!

dn