What are the key considerations when planning a gravel route through Africa that balances the need for challenging terrain with the requirement for relatively low-traffic roads, given the vast and varied landscapes that exist across the continent, and how do the different regions of Africa, such as the Atlas Mountains, the Drakensberg, and the Ethiopian Highlands, compare in terms of their gravel road networks, surface conditions, and scenic value, and are there any specific routes or regions that stand out as being particularly well-suited to gravel cycling, either due to their unique geography or the presence of established cycling routes or events, and how do the logistical challenges of cycling in Africa, such as accessing remote areas, obtaining supplies and support, and navigating cultural and linguistic differences, impact the planning and execution of a gravel route, and what strategies or approaches can be employed to mitigate these challenges and ensure a successful and enjoyable ride, and are there any notable examples of gravel cycling routes or events in Africa that have successfully addressed these challenges and provided a compelling and rewarding experience for participants, and what lessons can be learned from these examples that can be applied to the planning and execution of future gravel cycling routes and events in Africa?
