Planning a solo trip to Gambia in early Spring '08.
Did the trip on a 1200GS last Oct/Nov. Used Tourance tyres which were fine but did not do any serious offroad. Apart from bulbs and lenses and puncture repair I didn't take any spares. Only dealer is in Casablanca - Smeia - they are brilliant. You know Morocco so I'll write about further south.
Got the visa for Mauritania in Casablanca. Turn up at consulate about 9 a.m. with passport, fill in forms there and leave them, passport and money (cheaper than buying in the UK) for two visas - going and returning. Picked up passport with visas stamped in it at 3 p.m.
Laayoune expensive but there is a campsite - Camping Le Roi Bedouin - 22m north.
Dakhla modern with plenty of hotels and camping.
Petrol very cheap in the south of Morocco.
South of Dakhla and north of the border you will find the last filling station in Morocco you could stay there and head straight to Nouakchott avoiding Nouadibhou but see later.
Border crossing between Morocco and Mauritania reasonably hassle free but avoid 1200 - 1500, that's lunch break. There is no road but a well defined track - sand and rocks. The area is surrounded by mines and there have been some accidents and deaths. The track is easy to follow. You can also follow the trucks that go through but they are vv slow. There are guides who will lead you through on their mopeds.
A few miles after the border you come to a T junction with a caravan on the right where you can buy insurance for Mori. From here to be on the safe side you need enough fuel for 500k to get to Nouakchott. There are no filling stations on this road. In emergency you can find some Bedouin selling fuel from drums by the road. LITTLE OR NO UNLEADED FUEL SOUTH OF MOROCCO. Fuel is available in Nouadibhou but a bit of a trek there an back for not a particularly interesting place.
The road to Nouakchott is excellent. Take plenty of water. The main hazards are boredom and drifting sand. If you are into offroad then the old piste provides plenty of opportunity but heavy sandy going.
After Nouakchott the road to Senegal gets worse but is fine really. Do avoid Rosso just an endless hassle. Instead take the piste to Djama. As you approach Rosso turn right just afte the Total station and opposite the Taamin Assurance offices. The piste is easily manageable when dry though it could be a different story in the wet. Great place for birdwatching.
The Djama crossing is a breeze. Friendly officials, no hustlers and minimum amounts to pay. You can buy insurance at the border or you could arrange it over the internet with one of the companies in Senegal before you leave here. Best to take out the West Africa cover which will cover you for Senegal and the Gambia and lots of other countries.
The roads in Senegal vary but mostly ok. The border crossing into the Gambia was easy and laid back. The road to the Gambian river crossing and Banjul not good.
I stayed in Bakau, not impressed by Banjul and headed east to Basse Sante Su keeping south of the river. Horrendous road. I was told there was a good new road north of the river. I went back into Senegal to Tambouconda and then south to Kedougou for a few days.
And then there is the long, long trek back!!!!!
Great experience, lovely people, not too much hustle or hassle (apart from Rosso).
PM me if you want any other specific information.