I don't know the snow depth. A friend just spent a few days skiing Tahoe last week and a brief cold front moved through the bay area dumping a considerable amount of snow on the higher elevations. We had some big storms early in the season but lately the weather has been cool but sunny and nice. We do need more rain. Otherwise Tioga will be opening earlier than usual which would probably be during your time frame.
There is always a forum post updated about the opening date by early May.
I look forward to what you post from Yosemite!
All the best!
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe