You are lucky. I think there's only a couple of places in town that sell "real gas" and I believe one of them is a proprietary "card" thing
I drain the snowblower every year, and the carb bowl. No real problems. The lawn mower (I don't REALLY have an actual lawn LOL) I don't drain, just fill the tank and let it sit. I've had no real problems other than the stupid primer bulb which I don't use. I hate those things.