It's 630km to Arusha. We've got a full tank of gas, half a bag of melted chocolate, it's getting dark and we're wearing sunglasses. Hit it!

While it may seem like this whole trip has been a holiday (and ok, in a way it has), when you have visitors you have an excuse to switch out of budget traveller mode and into holiday mode proper. The last time Colleen visited I thoughtlessly caught malaria and we ended up doing little more than to…