I think I've narrowed it down to:
Pentax Q with standard 01 lens (50mm equivalent) and 3 batteries
Pentax K-5 with 3 batteries
Pentax DA ED-AL 16-45mm f4
Sigma DC 18-200mm f3.5-6.3
Sigma EX DC 30mm f1.4
Sigma EX DC 10-20mm f4-5.6
Pentax O-GPS1 GPS unit
Q-PK lens adaptor to allow the DSLR lenses to be used on the Q.  (With a crop factor of 5.8, using it on the Q with the 18-200 would be like having a 105-1160mm.)
BlackRapid strap (I much prefer this over a normal neckstrap. I switch between it and a wrist strap).
Lens cleaners, blower brush **
Canon Backpack with badging removed. 
Total weight about 5kg.
Add to that:
Tripod and Monopod which will be in the suitcase.
 
I could probably drop the 16-45mm which, along with the 10-20mm, I bought for the trip.
I'm still considering the Crumpler 6 Million Dollar Home rathr than the backpack but it's a shoulder bag. It's also bright green and obvious.
I'd like to take the Pentax DA* 60-250 F4 but it's a big heavy lens. It does take great pix, though. See 
Wings over Illawarra
** Thank goodness I'm not going via the USA where the TSA took a Rocket Blower 'cos they thought it looked like a bomb and could fly like a missile.  
 Photographer Has Blower Confiscated by TSA Because it 'Could Fly Like a Missile'
  Photographer Has Blower Confiscated by TSA Because it 'Could Fly Like a Missile'
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