I did a road trip through Holland, France and Germany last year using mainly minor roads but with some motorways in a RHD LB, no issues other than as Guy stated having to get out at the toll booths.
Having said that even if you were on the right side I doubt you would be able to reach high enough, the Lack of window opening tends to restrict you anyway.
I have inertia and harness belts fitted, inertia belts help a lot.
I would build LHD next time

Dave