How long do I realistically need for this ride?

[iamgigglz]

I can post a map link later but basically I'm looking at:
JHB
Bloem
Hang a left to do Lundin's Nek
Rhodes
Mt Fletcher
Up to Himeville
Up Sani
Check out Katse
Back down Sani
Through the Malotis (something more interesting than the N3)
Back to JHB

I'll be on my 990, potentially alone, usually camping.
I'm no speed demon; I'd rather chill at 60~80kph on good gravel.
I'm comfortable doing 600km in a day on tar but can do 800km when needed. It's just the passes and Lesotho where I'm not sure about the pace...

Also, this would probably be in late July so weather could be a serious factor.

 

[RobLH]

 

[petri oosthuizen]

 

[Gumba]

 

[Dwerg]

 

[iamgigglz]

 

[user 21416]

 

[OomD]