This part was surprisingly easy once I had samba running. I was
prepared to start grokking the printcap system, and printer daemons
and the like -- when in fact, all I needed to do was apt-get install
cups and all its peripherals:
apt-get install cupsys cupsys-bsd cupsys-client foomatic-bin
(These are just all the things you might have installed in Section 2.1, minus the samba packages themselves.)
CUPS then has a lovely little interface for you through your browser.