I think "Whitney Fan" here is planning on doing a R-2-R this fall. I am hoping he'll give us some details of his plans.

Part of the planning includes the transportation and lodging. It would be quite advantageous of two groups would work together, with one starting at one side and the other the opposite. Exchange cars before, then exchange keys mid-hike and drive back/meet somewhere afterwards.

I've made several Trans-Sierra day hikes using that method.