Pete, I thought you already had the air caddy.
Yes I do. I thought you were saying there were some hard cases in the $100 range that bike shop might stock. If there were I might use them to get our bikes home at the end of our summer tour.
The air caddy worked great when I was starting and ending the same place (with a short Amtrak leg) and it happened that I had a cooperative friend living there, but it is a bit of a hassle to knock it down to ship ahead or home so I am less inclined to use it when the beginning and end of the tour are not the same.
I am still undecided what I am doing for the Sierra Cascades trip. There is a chance we will travel via Amtrak. In that case it is a no-brainer that we'll take the bikes on the train. We may ship Amtrak Express if we fly out. Still tossing around options...