Preheat the camp oven to 375 degrees F (190 degrees C).
Blind bake the pie crusts for 13 minutes.
While the pie crust is cooking, in a skillet cook the diced bacon over medium heat. When the fat starts to render, add the diced onions. Once cooked take off the heat and stir through the thyme.
In a bowl whisk together the eggs, milk, and cream. Fold in the green onions, bacon mixture, cheese, salt, and pepper. Stir through until well distributed.
Split the egg mixture between the two pre-baked pie crusts making sure the fillings are evenly split.
Bake for 40 to 50 minutes until the top of the quiche is lightly browned but the middle is still jiggly. The quiche and eggs will continue to carry over cook once removed from the heat.
Let sit for 5 minutes, then serve while hot. Or, leave to cool and serve at room temperature, chill to serve as a picnic item at a later time, or let the quiche cool and set for an hour, then reheat to serve. This last option creates the best texture in the quiche but is also a little extra work.