The Shi Shi Beach road is foot traffic only, its a good 2-3 miles to the ridge and then a fairly steep hike down to the beach.
Haven't been out there lately but have trudged through mud way past ankle deep.
Once the Tsoo Yess road ends there is a parking lot.
Lot of rain here lately
www.wta.org has hiking reports that are usually fairly current.
Have fun, its a beautiful place. Be safe, check the tides.