There's a park and ride at Sportplex in Walnut Grove.
There's AMPLE parking at williowbrook mall, where the Route 502 goes by every 15 minutes to King George Skytrain Station.
Ladner/Delta has Ladner Exchange, and South Delta recreation centre.
http://www.translink.bc.ca/Commuting_Options/park_ride/
The funny thing is you keep on asking for a LRT system into Langley. When it is already proposed and in the works, albeit a long time away. But different projects are the forfront because they will affect more populatin (i.e. Evergreen, and UBC line).