question about Carradice saddlebags (Barley)

Howdy - I am considering getting Carradice Barley bag for my touring
bike
(Novara Randonee). I hope that it will provide somewhat flexible
storage
- small enough to keep it on a bike for most short rides
- yet big enough for say 80+ miles unsupported ride.
My bike has Books B17 saddle.

I never had a saddlebag on my bike so I am a little concerned about
two issues:
1. bag interfering with/grazing the back of my thighs
2. bag swinging back and forth and thus dissipating energy

I know that Carradice makes SQR support that will raise the bag and
move it
back - away from legs. There is also support (with QR and permanent
mount)
called Bagman. Both might be a good addition - not only because of
potential
contact with legs but also because that would allow some unobstructed
storage
on top of the rack (duffel bag etc).

TIA for any comments/pointers,

JT

PS. To landotter: it seems that I finally saw the light and decided to
use my
TOURING bike for what it was built for - longer distance rides. Put
back the
rack on it and pretty soon it will get permanent set of fenders ;-)