Make things nice for your farrier and chances are that he or she will respond in kind. Besides all this last minute stuff, there are some things your horses should know to make the shoeing go smoothly. This training job is yours, not the farriers. He does not have the time, nor is it in his professional code to train horses. The training should be repeated until the horse trusts the human handler, has confidence he can balance on three legs and respects restraint.
Restraint can be in the form of a verbal command, a couple of human arms, a leather strap, rope etc.
It is unnecessary to fight a horse. You see the familiar vehicle turn into your drive. There is a safe and comfortable place to work. You have a strong halter and leadrope in your hand. DON'T feel offended if your offer is rejected.