Wacky question-plane and bass!!

Hi all!

I am a co-owner of a 1968 Piper Arrow. (180 hp)
I am also a professional musician, and I play bass, both electric bass
guitar, and the big old doghouse upright bass.
Needless to say, I would like to be able to fly to my gigs whenever
possible, but fitting a double bass in a P28R seems like a tough
call....or...? The electric bass with a small amp is no problem, but much of
my work is on the upright...

Has anyone any experience with this?
Heck, I don't even know If it would fit through the door, never tried, but
for it to work at all, I'd need some sort of foldable seats in the rear, and
let the neck come between the front seats in some way.

Does anyone on this list know any bass players, or happen to be one, and
which planes would an upright bass fit in...?

Thanks for reading this absurd question..

Frode Berg
www.frodeberg.com