Just use Methyl Hydrate AKA gas line anti-freeze. I use this with Ethanol blended fuel with no troubles. In fact the bottle of gas line anti-freeze I have, states it works with Ethanol blended fuel.

Years ago, living up north, the gas line in my truck froze despite me previously dumping in about 1/2 liter of gas line anti-freeze. The air temp was at -42 F that night and 2 hours later with the help of a tiger torch, a 20 lb bottle of propane and completely encircling the bottom of my truck with plywood sheeting, the torch burning underneath the truck eventually warmed and thawed the gas line enough to re-start the engine. Needless to say, I dumped in lot more anti-freeze after that...