I think your plan sounds great. Keeping the blood moving after hard runs helps me quite noticeably. You may feel you need the shake-out run you mentioned of 4-5 miles on Wednesday. On the other hand, your body may recognize how ultra-fit it is at that point and not pester you for a run. I don't believe you will need the run for fitness sake.
I did not do any running between weekends. I love running (no kidding?!) and yet didn't feel the slightest need to do any at all between race weekends. I had toured the parks **hard** everyday from the Tuesday I arrived in Orlando, each race day after the races, and then the Monday, Tuesday, and Wednesday after the Dopey. I flew to Anaheim on Thursday and continued the park touring there, and managed to do very well in the Tinker Bell races.
For recovery, in addition to miles and miles of walking, I did 20 minutes on/20 minutes off icing of my quads and hips once or twice a day (big garbage bag with ice alternating on the quads, then under the tush to get my arthritic hip joints). I also used a grid roller and a stick roller, but only when I felt something tightening up (mostly one side of my neck).
I hope you will post up your strategy and how it goes -- I certainly enjoy picking up tips from others.