According to the Yosemite road info (209.372.0200), Tioga Rd will open this Monday. That’s quite early, far earlier than last year when it opened in late June.
I will likely offer a photo tour to Yosemite in late June this year.
See also my bicycling route in Yosemite National Park — Olmstead Point to Tioga Pass.
Dennis Mattinson’s Eastern Sierra Weather Center is a good place to check on overall conditions in the easter Sierra Nevada.