Just a little hint, don't have both chocks real close to the tyres as when it settles with a full load you'll find it hard to remove them. Also, chock the main wheels, not the nose.
Definitely use the steering bypass pin or you could find a broken towbar. Remember to remove it AFTER taking the towbar off and show it to the crew when you have taken it out.
Any more help needed PM me!
OB