In the first photo....
The large black dufflebag on the left is my checked luggage which contains clothing, tripod & heads, some camera accessories. The bag is durable, light and fully packed I'm able to just squeeze in under the weight restriction! I use clothes and spare shoes as padding to protect the tripod & other gear.
The black camera pack on the right is my carry-on containing all of my lenses, bodies, binoculars, etc. This is a new pack I just bought this past week - a Gura Gear "Kiboko" bag, which is large enough to fit all of my basic camera gear (including my 500/4 lens) yet extremely light so the pack doesn't add much weight. I love this bag! See second and third photos below for closeups of how the camera gear is packed in it.
The third bag (blue daypack) contains my laptop and a few basic travel items(chewing gum, magazine, Blackberry). This my 'personal item' allowed for carry-on.
I'm off to bed for a short sleep. Check back in a couple of days to see some photos of Panama birds, wildlife and landscapes!