Another option might be to set up a small solar cell with a battery and inverter. That will give you a little while on a small
pump and air pump. You can also use it on a regular basis to save a few cents on your regular electricity bill, or just have the small solar set charge a few batteries for emergencies.
I think harbor freight has like 30 dollar 12V solar set every now and then. A couple of those should be able to run the airpump and water pump pretty much full time, so would be more than adiquate for emergencies with the system.
You can probably get that set up for less than the cost of a generator.
I am happy to hear that the plants faired well with little loss. With hope there is a sucker on the tomatoes you haven't plucked off yet :P That will buy you some more time.