Did an overnighter here around New Years 1981. Dry year, no snow.
Very cold and very windy overnight. In the morning dead calm and the most glorious sunrise I have ever witnessed. Peak was easy walk up without snow. Spiral bound log at summit.
Hiked Telescope yesterday 5/7/15- the Wildrose-Trona road was closed between the junction with Panamint Valley Rd and the Wildrose CG. Emigrant Canyon Rd is open the whole way. Also for what it's worth, I was able to get up to Mahogany flats in a Toyota Camry with pretty much no problem. It was definitely bumpy, but not rutted out like the description says here. Maybe I just caught it at a good time- I would say high clearance is recommended but not a must.