Hopefully the OP has some good ideas by now, so I will hijack the thread for my own nefarious purposes
How hard is the traverse from Johnson to Trapezoid ? I was thinking of heading up from South Lake to Treasure Col to Johnson's NW Ridge, then heading over to Trapezoid, finally down its NW ridge and back via the Bishop Pass trail. I seem to remember someone saying class 4, but cannot find the thread.
edit: Never mind, Secor says the W Ridge from Johnson is class 3.