I have a Dörr/Danubia backpack with built in trolley. It takes easily my
Nikon N90 with the attached Nikon 2,8/80-200
Nikon TC-16A Teleconcerter
Nikon N60 with attached Sigma 2,8-4/28-105
Metz Mecablitz MZ40
Air Band Receiver
There is still enough space for a F5 and a F100.
It can still take up to 100 films (the film bag can be removed, especially for hand check at the airport) and many batteries. There are also 3 compartements for tripods.
I hope this would help you.