Ive seen plenty of (usually german) loaded tourists using aerobars. There are several ways of using them.
Time trialling position: add them to some low bars for aerodynamics.
Triathalon : Use touring position rotated forward about the bottom bracket, to rest arms after a swim, and make better use of running muscles (ie a bike for non-cyclists)
Touring. Fairly high up and back (compared to racing) for a more comfortable and very slightly aero position.

You can use Spinnacci bars as an alternative to a set of aeros.