Hi Suika,
From the weddings I've attended without an AP box, I notice most if not all guests giving APs directly to the parents, or else, to the groom. Very seldom the bride. The groom would be accompanied by his "brothers" and these "brothers" will safe keep the APs for him. Usually these APs will be given during cocktail to the groom and respective parents, if not, then directly to the reception helpers, if not, then to the bride and groom and their parents when they go from table to table for group photography...I think I may end up doing this also. I think it's a bit "nan2 kan4" to have a AP box sitting there on reception table.