Amtrak is now offering Walk-On Bicycle Service for all stops on the Capitol Limited. For an extra $20 on top of your ticket price, you can secure your bicycle in a specially equipped baggage car then ride in comfort to the start or end of your bicycle journey. Because there are only 8 racks per train, make your plans and reservations early. We hope there will be additional racks in the future, but this is a good start. Go here make your Amtrak reservation.
To see how the racks work, watch this video from the manufacturer, toward the bottom of the page. Amtrak has added a velcro strap on the stabilizing arm for easy attachment to your bicycle frame. It's a good idea to remove panniers and heavy bags from your bike before you board. There is unsecured luggage space in the bicycle car or you can take your gear with you to your seat. The luggage room is locked so no one can have access to your bike (and bags, if you leave them) during transit.
With the conductor's assistance, you should be able to get to the bike storage car a few minutes before your stop so you can get your bike and gear ready to roll off at the station.