IDPs and Visas

Been working on the paperwork side of things lately. Got my IDP ready, bought my ticket to London. The Bug should be setting sail on Monday and the visas are a pain!!!! We narrowed it down like this:
At first, we were getting Visas for: Morocco, Mauritania, Senegal, Guinea, Mali, Burkina Faso, Togo, Benin, Nigeria and Cameroon. Ten Visas total and we thought we were going to spend a ton. We found out we can get out Visas for Mauritania and Mali in Rabbat, Morocco. Now we were down to 8. We then figured we can drop Guinea and Senegal which took us down to 6. With avoiding Senegal we don't need to get a Carnet De Passage but we will need to apply for a Laissez Passer at the borders. Finally, we found out that we only need a passport to get into Morocco which bring us down to 5 Visas. Now the time frame works and we won't be spending as much as we thought.
Other things with the Visas included itinerarys to countries in which we hope to drive to on a certain date. How can we tell them when and where we will be staying when we don't even know if we will make it on time nor any hotels, brothels or floors we can stay at. That is proving to be a pain.