Our office started with Macintosh IIsi machines running System 7.5.5 and localtalk, along with an Apple LaserWriter on Localtalk. Then we upgraded to a HP Laserjet 4050n and bought an Asante Localtalk to Ethernet bridge. Eventually we upgraded the Macintosh IIsi machines to ethernet. So essentially like your SE/30. Printing to the HP 4050n was quite simple an easy, and used the Apple LaserWriter print driver.
In fact, we still use an eMac running Mac OS 9 to print barcoded shipping labels from HyperCard to the HP 4050n.