Always check with Amtrak directly for latest policy.

Within the last 5 years, we have taken that train with our bikes and 2 panniers each bike on several trips in both directions via train. (It's wonderful by the way, the train hugs the coastline. There' s a lunch dining car too.) You reserve a bike and pay for bike in bike car which has racks. It's very painless. I think it was around $5.00 US per trip per bike.

I would strongly recommend it. When you are going? I'll be in downtown Vancouver in a few wks.