How fast do you hike? If you are a 25 mile a day person you could probably get it done by early September with a mid April start. If you are stuck with the April 1st start, here is the snow information for January 26th…
The Southern Sierra is at 70% of the APRIL 1ST average. This is about 20% above average for January 26th. If the snowfall continues above average (a big if) then you will have almost solid snow in late May and early June. If it goes down to average, you are looking at the southern Sierra being doable around June 15th, with a lot of snow on the passes still.
Here is the kicker for this year. There is about 6-8 feet of snow on Mt. San Jacinto and 5-6 feet of snow around Big Bear and Mt. Baden-Powell. If you go in April, please take an ice axe and crampons. It gets dicey on the steeper slopes.
As things stand right now, I think your flopping might make the most sense. Be forewarned that those who flop in high snowfall years usually find quite a bit of snow in Northern California still. You might want to read Mountain Goats PCT journal of 2005, which was a high snowfall year! Hope this helps. Robocop
Robocop