mate of mine (unfortunatley passed away now ) did the states a few years back .. though he took his own bike..
shipped his bike (pan euorpean) over to the US with ACL (atlantic containers ltd) then flew over and picked it up and then spent 3 months touring taking in some of the rallies ie sturgess etc ...
biggest problem he had was getting insurance to ride his own bike in the US ....
apparently it was cheaper to ship his bike than it was for him to fly ...