As far as printing goes, 24" seems to be as "wide format" as one can go without needing a program like a RIP to help out.
As far as going direct to a plotter, I think that there have been some changes to Corel to were it isn't as simple as just having the OEM plotter driver and then go to File > Print and selecting the plotter as a "printer" and go from there. Now, one is going to need to setup the plotter as an HPGL printer (preferably a RAW HPGL printer if the printer is able to take that RAW format and parse what it needs). It's fairly easy to do on Linux (as in via GUI), which is a good thing as there are no OEM drivers for plotters on that system. I don't know how easy it is to do on Windows however. As I started doing things in this manner after I stopped using Windows systems.
That's about as good as it seems like it's going to be for trying to do things strictly within DRAW without the aid of a plugin and/or dedicated program.