Thanks everyone, I wanted to post a followup. (Don't ya just hate when someone asks for advice but never finishes the conversation?)

Way too much time on the internet and I went to my LBS and sat down with him for a long time while he looked and made some phone calls. I settled on this LongBike Tote.

The Cadillac dealer took forever and had a false start where they needed to order additional parts. But the install looks great.

The LongBike Tote was easy to assemble but their instructions where terrible. I ended up just looking at the pictures on their website. A kvetch: shouldn't have to take 4 sizes of sockets to assemble, one of which I had to buy.

The picture shows the results and maiden voyage will be this weekend. The picture shows the rear wheel on, but there is another config taking that off to reduce the width.