Hi, Paul! Congratulations on your upcoming nuptials...I can't think of a better place to unite your family than at WDW! The
Wishes Fireworks Dessert Party is a wonderful separately-priced event at the Magic Kingdom which gives you a guaranteed great view of the fireworks spectacular while being able to enjoy some rather tasty desserts, too.
The party usually is held nightly during the summer months. However, I have known of friends and family who have attended in the spring of this year, and from what I understand, Disney is accepting reservations throughout the fall as well.
Since your wedding day is more than 180 days from now, I would place an initial call to 407-WDW-DINE to inquire about the 2011 plans. Then, call back to make your reservations for the day you're requesting. Please know that there are separate prices for ages 10+ and 3-9 years, and pre-payment is required. There may be a price increase for peak seasons, and the Disney Dining Plan is not accepted.
I think this a marvelous idea to celebrate your special occasion. Blessings on you as you begin your life together. Have a wonderful day and a most magical celebration vacation!