Thanks for the feedback everyone. I find it a little funny that the only place we can find the printed rule is on the "We like bikes" brochure. Clearly, there is more work to do here.
From my (way too long) conversation with the driver, I was told that bikes are to be placed only in the wheelchair spot, after folding up the seat there...one located in the front of the train, one in the back. (And if there's a wheelchair on the train, they get dibs on that spot, which I'm fine with, of course.)
The result of this is two things: 1. For a father-son bike outing to involve a train, it means I'd need to leave my son unattended at the opposite end of the vehicle. And while the kindness Wille and his gf provided is to be commended, I don't think I'd want to count on finding it.
2. This rule also means that one of us would have to roll our bike through the entire length of the train car to reach the designated parking space... so you have to essentially be a dick to everybody else on the train, especially to someone in the aisle.
This baffles me. Why not pull out a few seats in the back, and designate a bike area? If there's no bikes, people can still stand there - and heck, in this case it would increase the capacity of the car.
How did it work on Car-Free-Friday in the S. Hills? More that 2 bikes per empty train must have been anarchy!!!