I have two small Honda quiet inverter generators, a 1,000 and a 2,000 watt unit. The 1,000 watt should be able to charge your battery, depending on the charger. I can bring the generator, you will have to run it during the day and rely on your battery after the 10:00 PM quiet time.
That should keep you going on Alternative Power.
If you think your battery will last you through Saturday and will then charge enough while you sleep to get you through Sunday you won’t need the generator.
I think I will plan on bringing the little generator anyway, plus my house is only 11 minutes away if we need something else.