Get a hot fire going - whether in the BBQ or a charcoal grill - then place a cast iron skillet on the grill grates to preheat.
Divide dough into 4 equal pieces, flatten each into a 6-7" round circle. Allow to rise for another 10 minutes in a warm place.
Spray the preheated pan with a bit of nonstick spray, then add one dough round to it. Cook over the hot fire until the bottom is golden brown - this usually takes 3 or 4 minutes, depending on the campfire and setup.
Once the bottom looks good, remove the pan from the heat.
Spray the top with nonstick spray and use some tongs to flip the crust over.
Spread pizza sauce over surface of each pizza round, then top with shredded mozzarella and your choice of toppings.
Cover the pan with a fitted lid - or some tinfoil- and return it to the campfire or grill. Cook for another 5 minutes or so, until the pizza is cooked through, the bottom of the crust is golden brown, and the cheese is melted.
Repeat with as many of the pizza rounds as you want to prepare - the rest can be wrapped in plastic and kept in the fridge for a couple days, or frozen.
As the pizzas come off the grill, cut into slices and serve hot!