Closed, but a great alternative just north
Went by here on Thanksgiving day 2020 Closed ,gated
North of Summerdale is goat meadow snow play area. Big parking lot that people boondock and car camp in. I car camped just of the 06 forest road. Its the road to the left before the parking lot. There are a handful of spots for dispersed camping. Road is decent and good Verizon signal.
You can also hike to Mariposa Grove from the goat meadow parking lot. Or you can drive about 3 miles from parking lot to a gate that is about a 1.5 mile walk to the Mariposa Grove hiking park.
Very good and scenic hike.