Some friends and I will start overlanding from Morocco: January 2012 to ???
My current take on things is that Angola and now possibly Nigeria are the ones to be most concerned with, and that many others mostly seem possible on the fly. For still others it seems like a grey area.
Below are the relevant countries -- could we all work together on filling this in with a brief summary of experience (time taken, where acquired, cost)? In particular, does anyone have any relevant info on the Visa Entente? Once I finish this trip next year, I will provide a thorough update here, I promise! (I have a US passport.)
Morocco (no visa needed for US/EU)
Senegal (no visa needed for EU/US less than 90 days)
Sierra Leone (Must get in advance?)
CDI (Visa Entente?) (not currently advisable to go?)
Burkina Faso (Visa Entente?) (new high fees, I read $181 if through US Embassy)
Togo (Visa Entente?)
Benin (Visa Entente?)
Nigeria (Seems like it may be one we need to get ahead of time in the US)
Equitorial Guinea (No visa required, but need small pox and cholera in addition to the oft-required yellow fever).
Congo (Brazzaville) (need letter of invitation?) (possible to get transit through or around to Congo -- Kinshasha and down to Angola?)
Congo (Kinshasha) (possible to get transit through or around to Angola?)
Angola (Seems by consensus the most difficult)
Botswana (Not needed)
South Africa (Not needed)