Should we stay or should we Gueckedou?

We stayed overnight on the outskirts of Gueckedou, at the rear of an old Government seedbank! The previous day we set off after a good night at the Forestry School in Mamou. The road to Kissing-you-roo (sic - actually Kissidougou - ed) was brilliant - we drove 400km in 9 hours. The last 40km of the road has been horrendous, only managing 5k an hour. The prospect of 300km more of the same is giving us doubt as to our course. Should we stay on track, or turn back?