The following is recent blog post at Vancouver Trails on access issues for Tunnel Bluffs.

Seems to me that with all the access challenges in the Sea to Sky Corridor, I am going to have my hands full this summer managing and maintaining the Watersprite Lake Trail up to snuff to handle the hordes of hikers who are now facing fewer reliable S2S hiking destinations.
 
 
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The route to Tunnel Bluffs now starts from the Sunset Trailhead Parking lot in Lions Bay. View the updated Tunnel Bluffs route.

Tunnel Point Update from March 11, 2020:

A 30-minute parking restriction near the trailhead to the popular Tunnel Bluffs trail has been put in place. The Ministry of Transportation (Facebook | Twitter) and Sea To Sky Highway Investments (Facebook | Twitter) put up the 30-minute parking signs at the Tunnel Point parking area on March 9, 2020. They would also like to remind the public that parking along the Sea To Sky Highway is not permitted and crossing the highway is illegal.

Unfortunately, these restrictions make the Tunnel Point route to Tunnel Bluffs inaccessible.