To get the pitch bends, I had to do a an LFO modifying the pitch locked on that note, then reset the LFO on the next note so it only runs for half a cycle. BUT that first one isn't followed by a note to cancel the LFO, so you have to use Digitone's "trig-less trig" feature (i.e. a locked parameter setting without a note associated with it).
In the end getting this all set up was NOT faster than just learning to play it live on the keyboard and do the bends manually. But the point of this exercise was to learn the Digitone, not to learn the lead line from the Yoshi's Island theme, so. Here we are.
Oh and actually if I map portamento to the mod wheel and play it that way, I can probably be expressive with the bend and still parameter lock it from a live performance. Hm. Something to experiment with.