Double the recipe to create a large number of cupcakes. More than doubling is not recommended for best results.
The extra fine edible glitter can be found at cake and candy supply stores or online at countrykitchensa.com; search for extra fine edible glitter.
For a lovely presentation, consider cupcake wrappers from a website like fancyflours.com.
Try a practice run well in advance of the wedding, then you'll know exactly what to expect. You can make the cupcakes up to 2 weeks ahead of time. Wrap filled, unfrosted cupcakes well with plastic food wrap; freeze. Six hours before frosting, remove from the freezer, loosely cover and defrost. Frost and refrigerate loosely covered. Serve within 24 hours.
If you have only one pan and a recipe calls for more cupcakes than your pan will make, cover and refrigerate the rest of the batter while baking the first batch. Cool the pan about 15 minutes, then bake the rest of the batter, adding 1 to 2 minutes to the bake time.