The ONLY thing Id worry about is, .. it's getting towards the end of their growing / ripening season.
MASSIVE crop scares me, how heavy are your branches. Satsuma's have an issue as it is with the branches getting so heavy with oranges that they can start breaking off the trees. Now lets throw some 30 to 40 mph winds on that....
I honestly don't think if they get frosted it's going to harm them as far as food quality goes. The skins may get mottled looking and icky but the orange should be fine. Many times, the growers WANT some cold to hit their trees because it does sweeten them up.
They don't need to goto waste. Juice them and freeze the juice if need be. Drink it later. The girls will eat oranges too but obviously don't go overboard there

The rest should compost or throw the peels into a potpourri pot and freshen up the house a bit.
Give them away, say they are FRESH ORGANIC oranges, because you didn't put a ton of chemicals on them, and since you are growing them responsibly, NO they are NOT going to be the picture of perfection, they will have blemishes, dents, scars, you know. what REAL ORANGES have
Aaron