Grumbles69
Your case does allow for some priority in boarding. Currently, that would be after Speedy Boarding. In the Special Assistance Group. The code to quote in your case would be two DPNA passengers travelling with you. Check-in should put this SSR comment in the system so that the gate staff and Dispatcher will know about you and that information will be passed onto the Cabin Crew.
However, You do need to arrive at the gate in good time. Before boarding has commenced!