The California Grill will totally work with you. They are great. What you need to do is get past the WDW gatekeepers and talk to someone directly at the restaurant. Try calling the restaurant directly the night before you are set to go there. You can get the number from the Poly conceirge, or someone on this board may have it. Find out what time the first PS is, and call 20 minutes before; tell them you'll be there the next night and will be proposing.
Another option, if it's really important to you to do it during the fireworks, then make your PS for about an hour ahead of when the fireworks were the year before. If you finish dinner, just sit in the lounge and have a drink. The lounge has the best views anyway, or at least as good as anywhere else in the CG. You can always just sit at the bar having drinks until the fireworks start and then walk out on the terrace and do it there. It actually would be a good spot. Can you go the night before to check out the layout? Just tell the checkers in down at the second floor that you want to go up for drinks; they'll let you up if you're persistent.
Another option, if it's really important to you to do it during the fireworks, then make your PS for about an hour ahead of when the fireworks were the year before. If you finish dinner, just sit in the lounge and have a drink. The lounge has the best views anyway, or at least as good as anywhere else in the CG. You can always just sit at the bar having drinks until the fireworks start and then walk out on the terrace and do it there. It actually would be a good spot. Can you go the night before to check out the layout? Just tell the checkers in down at the second floor that you want to go up for drinks; they'll let you up if you're persistent.


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