Why is there another series on the schedule? Read this article.
The gist is, more manageable routes, but self-supported.

This is the Whatcom Wamble route, but starting in Vancouver!
If you want to start in Fort Langley still, contact the organizer, but you'll have to submit your own version of the RideWithGPS, Cue sheet, and Control Card for pre-approval.

The classic route. No support. More info to come on control and services availability given the later timings.