My boat is 9'1" beam and has been too and from FL from MD with no permits hell not even a tag on trailer one trip.
No problems at all.
Every state has max width reg's most are 8' 6" 102" wide and most states will allow a non CDL driver to run around the clock under a certain width. Most state's allow it if you they do not reguire and escort.
Just build one bunk higher then the other to offset width...