9000 watts? Seems like considerable overkill...and you did you notice it weighed 220#?
If you're willing to spend that kind of money, consdier the 2800W inverter
Champion 2,800W Running / 3,100W Peak Digital Inverter Gas Generator (CARB-50 State compliant)
You won't be able to run your A/C and microwave at the same time but should handle everything else.
It's much quieter and lighter than the 9000W and provides cleaner power (which is important for electronics)
Inverter generators are prefered for camping since they are so much quieter and provide cleaner power. The "gold standard" is dual Honda 2000W, but that will set you back about $2,000.