If i register 3 people under their names, is it possible to change their names to backup crew on registration day? Only worried that if we weigh a fish or win a prize, people in the crowd would know that the person accepting the prize is not the name called.

You can change crew names when you register at the tournament to pick up your Boat Bags & Angler ID cards. Please remember that for all lucky draws the registered angler must be the one who comes up to collect the prize. Prof of ID may be requested and presenting someone elses ticket means disqualifiction from the tournament.