To me an aerobar serves two purposes:

a) It gets me more aero
b) It allows me to rest my hands and instead rest of my arms, something I can do for longer periods of time.

For a touring bike I think b) is far more important and I found a nice set of aero bars that sit up "high" so your not completely flat.

See https://www.amazon.com/kokorest-Rela...ords=aero+bars

These are a later model of the one I got, but the important part is that the aero bars sit on *top* of the handle bars leading to a more upright position.