Hello Lisa! Welcome to the Disney Parks Moms Panel.
I was able to experience my first
Candlelight Processional at Epcot last year after a fine meal and seeing some fine performances for
Holidays Around the World at Epcot.
Due to the popularity of the Candlelight Processional, booking
Advanced Dining Reservations for the Candlelight Dinner Package is a great way to ensure some excellent seating for the show after some excellent food.
As planning for events such as the Candlelight Processional frequently change from season-to-season(and sometimes by show), it is difficult to say specifically how the seating and queues will be set-up this year. Based on last year's event,
Guests part of the Candlelight Dining Package were given special badges with the date and time of their valid show that granted them access to great seats (during the show I attended, it was near the front and to the left and center).
There were Cast Members who acted as gatekeepers near these areas who allowed Guests with badges to find seating in these reserved areas. As far as queuing up before the show, just look for signage or speak with a Cast Member and let them know that you are a part of the Candlelight Dining Package and they will direct you.
Happy Holidays Around the World!
~Todd