Too much ado about the ethanol issue.
Don't know where you are from but in the Midwest we have had this added to our fuel for over 20 years now. If all these rumors were true you'd see nothing but dead vehicles lining the streets.
My MH used to sit from September to May every year. Started the gen up at least 2 times a month never put anything in the carb. Yes I do put stabil in the MH gas tank, but that's because ALL gas even pure goes south after a while.
No need to drain the carb in gen because if you are starting it regularly like recommended you are pulling in the fuel from the tank that is treated with the stabil.