I have the Sport carrier
http://www.mototote.com/default.aspx?ProductID=44
and have been very happy with it. I must admit that I get the drive off heebie geebies but have never had a problem. I get worried even with trailers.
I have gone as far as Laguna Seca from San Diego. Its nice being able to drive with traffic rather than the rt 2 lanes and worrying about trailer speed limits.
I don't have a problem loading/unloading by myself either.