Seems like a lot of hassle with questionable results (lowering octane etc).
Just drain the carb and maybe even the tank if you plan on having it sit for half a year, that one operation is a lot less of a pain in the ass than separating the ethanol from the fuel every time you need to fuel. I think the biggest issue with todays fuel is that it expires quickly. I usually drain the tanks of my summer stuff and use the fuel in my atv and snow blower during the winter, and after winter I drain the snowmobile tanks and use the fuel in my lawnmower, so I start with fresh fuel every season.
I actually started running my racing snowmobile (335cc 2-stroke) on E85 this winter as an experiment, poor man's methanol... Seems to be working great so far. On regular gasoline the cylinder and head get boiling hot, on E85 they barely get warm to the touch because of all the extra fuel I can put in having a nice cooling effect. Colder engine in its turn allows for more performance. Ethanol is not all bad :)