7pm is okay. Remember that this is ps, so you might not get seated right away. As for the patio, you can request it when you check into the podium, but I can almost guarantee that everyone who has a 6:30pm or later dinner is requesting the same exact thing. It's luck of the draw and there's really nothing you can do to improve your odds. Also, being on the patio does not mean that you'll get an Illuminations view. There are a number of tables that are back under the awning and you won't see anything in the sky. The Rose & Crown policy is that when you're name comes up in the ps queue, whatever table is available for the number of your party is where you'll be seated. You can't offer to wait for an outside table, but you can ask to be put back into the ps queue to take your chances again. Obviously, the later it is, the less likely you will get an Illuminations view.