The days on the coach are long as you often leave early morning and arrive early evening. However I'll add that like most touring hols you have a number of interesting stop offs along the way which split the travel periods.

Take lots of music to capture the mood at each stage of the journey.  I feel that we missed a lot along the way and I really want to do this tour again.  But I can't recommend this trip enough.  A real adventure. Choose a good guide book.  Be relaxed about fellow travellers - it's an epic journey.  Have a great time!