Best options

I'm heading to Namibia in October and am considering which lens/camera combinations to take. I am a bit concerned about the weight factor on the aircraft and the dust entry aspect on the ground. Especially around Sossusvlei & Etosha.
Equipment available. Canon 7D & 40D both crop sensor.
Lenses : Sigma 50-500 & 18-300 : Canon 50mm & 10-20mm
I invariably use the 18 -300mm as a go to lens on my trips but given the wildlife opportunities in Etosha I'm thinking I might need the reach of the 50-500 possibly on a 2nd body. This is where the weight factor comes in. If needs be I'll just have to take fewer shirts and leave my wellies behind

I don't specialise in any specific area of photography and try to catch every precious moment that I can.
Has anyone had experience of this situation and can advise ?
Your thoughts would be appreciated.
Equipment available. Canon 7D & 40D both crop sensor.
Lenses : Sigma 50-500 & 18-300 : Canon 50mm & 10-20mm
I invariably use the 18 -300mm as a go to lens on my trips but given the wildlife opportunities in Etosha I'm thinking I might need the reach of the 50-500 possibly on a 2nd body. This is where the weight factor comes in. If needs be I'll just have to take fewer shirts and leave my wellies behind


I don't specialise in any specific area of photography and try to catch every precious moment that I can.
Has anyone had experience of this situation and can advise ?
Your thoughts would be appreciated.
