Grattan,Gingerman ? What Club do you ride with ? I do track days with NESBA and STT plus private club.
If that is for track days I would advise against "rail" trailer.You are gonna carry extra fuel,that stinky gas inside of a car is no fun.Plus tires,stands,etc.
Get someting with at least 13 inch wheels,those small ones will spin like crazy,risking wheel bearing failure.
Let me tell you,many times track activity continues also on your way home.
Not that I know that from personal experience,hmm,but Saab with turbo engine will top out at 118 mph while pulling flat bad 5X8 trailer with 2 bikes.
That is why I would go with bigger wheels.
What about Autobahn,that track is fun,close to home,STT will be there in 2 weeks,I`ll be there plus my track buddies,we all are very good looking,handsome guys.