Again, don't get me wrong: My goal at every wedding is to make sure that each and every guest in attendance feel like they are involved and part of the party. A sparkler send-off is a great way to achieve that goal!
With that being said, let me propose an alternate idea. Imagine all of your family and friends gathered in a circle outside of your reception. You and new-spouse take your spot in the middle of said circle and take your last dance of the night as everyone lights their sparklers one at a time. Not only is this a safer option, it will allow your photo/videographers plenty of time to get the perfect shots of this memorable moment. You finish your final dance on your wedding night as the sparklers fade out. The perfect ending to a perfect night!