I am getting a late start (typical) and attempting to get to Saqqara and Dahshur today.
Apparently the best way to do this is to get myself to the Giza Pyramids and rent a horse from there.
But that's three hours in each direction, and six hours on a horse in the desert actually sound highly unpleasant to me. (I went horseback for 4 days once in the Grand Tetons and my butt still hurts--and that was in the early 90s.)
The second best way is by tour or taxi. I am not looking forward to taxi negotiations. I am going to start by searching for the bus that goes to the Giza Pyramids. If that becomes frustrating, I'll get on the metro to Giza and wing it from there. I just have to bear in mind that the fun is in the chase.