Here in good ol central PA, almost all gas is 15 percent ethanol, and has been for a dozen years or so. There are a handful of places that also have "non ethanol recreational fuel" but it's about 60 cents a gallon more money.
I'm not a big believer in snake oil products, but I heard about Startron. The claim is that it counteracts the harmful effects of ethanol. And I believe in it because I've had engines sit for a few years with Startron in with the fuel in the tank, and have had zero ethanol related fuel issues. Just tossing that info out there. It's a blue liquid in a clear bottle. Around 7 bucks, and it will treat a full 30 gallon tank easily. Make sure you get the blue. They also make a red for diesel fuel. Not the same, lol