Hi Sandra. Disney park hours vary based on season. Not to worry about your dinner reservations, as the restaurants remain open, and even if you were to be the last table sat for the evening, you would be able to enjoy your dinner at a relaxed pace.
To find the time of Illuminations the night you will be there, please visit the monthly
theme park calendar. If you click on your specific date, you will get a listing of park hours, any special events taking place that day, including parade and Illuminations times.
For the first time since I worked at Le Cellier over 20 years ago, we ate there this past September, and loved every minute of it! Enjoy your vacation (and your 'Canadian' dinner) Sandra!