there's no advantage to my setup to have split bars.
I setup the bike with differing types of handlebars that swap out in just a couple of minutes, to go from drop to flat to upright with ease.
Fietsbob, you should cable a trekking bar identically, so you could switch between the drop bar and trekking bar in short order. then you could choose the bar for the trip without a lot of monkeybusiness moving componetry between the bars.