Fireworks Surprise

We are planning fireworks at our reception 🤗Our wedding planner brought up the idea that we can make it a surprise by performing our first dance outside and then having fireworks go off at the end of the dance. I love this idea, but we have an entire choreographed dance and there is no real dance floor outside. I would feel more comfortable performing the dance inside on the dance floor. How else can we get everyone outside but not ruin the surprise? I don’t want the DJ to announce something like “please join us outside for a surprise” I think that will be too obvious. Any ideas?