Since the Boardwalk is the unofficial replacement for the Kingpin, and since the Kingpin was designed for longer distance travel than the Hammer, I would say it is safe to assume that the Boardwalk has inherited a similar DNA with the Kingpin. If that's the case you will be able to ride longer on the Boardwalk than on a Hammer. Not sure if someone has actually moved from a Hammer to a Boardwalk to give you a better comparison.
Also, the OP moved to a Boardwalk from a Cross Roads, and since he did not complain about comfort, if the Boardwalk is nearly as comfortable as the XR, then you would be in great shape riding the BW.
People can and do tour on just about anything imaginable, doesn't make it cut out for the job.
The KP had a great suspension, ergonomic handlebars, a very good stock seat, tubeless tires, and the ability to add purposeful bags/trunk.
The Boardwalk has a low end suspension, beach bars, a scooped out seat, tube tires, and a couple of small saddlebags that are supposedly "lock and ride" with the purchase of a separate part. I'd love to see where they put the locks on those.
The BW is a cruiser designed to ride around town and look cute. If you want something proper for touring, buy an X bike. The patriarch of the Victory cruiser line is dead, long live the tourers...