If I still worked for Forward Air I could probably get you a deal but that option is gone.
However, they have VERY nice motorcycle containers and a really quick schedule.
forwardair.comTowards the bottom left is the Motorcycle Shipping link. I think a medium container would be big enough but the dimensions are listed. Click the "check rates" and choose origin and destination. Seattle is the only terminal they have in Washington state and it looks like Detroit would be the closest destination to your home.
I checked the rates and a medium container would be $1,022.41. I don't remember if there are any other fees attached to that or not. There's a phone number for the Motorcycle division and they're really nice folks. It's about 4 days transit time.
One of the REALLY nice things is you can book it online with a credit card. Once they have your reservation, they'll email you when a container is available. Sometimes they have to have containers brought in from other stations and that can take another week or so but Seattle may have some on the dock.
If you need any help, let me know. I can still make phone calls and make some requests. I didn't burn any bridges when I left but I can't get "special pricing" any more. :dunno2: