We always make PS for 7:30 at R&C and then check in about 15 minutes early. We ask the hostess as nicely as possible that we would like to be seated outside with a view of Illuminations. The hostess always tells us that it will take longer to be seated but she will do what she can. Usually, our little device goes off about 20 to 25 minutes later and we are seated with a view. While we wait we usually just grab a beer and hang out.
When we are seated, I always inform the waiter or waitress that we are "camping" for Illuminations and plan to order slowly (drinks first, then appetizer, then main course, etc..). I always tip the waiter or waitress at this time. It just makes me feel more comfortable. I usually give them $20. They have always been VERY nice and understanding.
This is the only Epcot restaurant that I've watched Illuminations from. I like the quick get-a-way out the back exit to the Boardwalk.