I haven't taken out Shimano bar end shifters except for 9/10/11 speed on my tri-bike(s) so I'm no help here. Except I would expect them to be the standard CCW to loosen. For the crank bolt cover, they are standard threaded so CCW to loosen. I've encountered some bad/neglected bikes and never had an issue removing the Campy crank cover with an Allen wrench. If it is stripped, I would try penetrating solvent (PB blaster is my choice) and shove a flat end screw driver in to try to somewhat save the cap.