I've run Av gas in my saws and racing motorcycles before at 50:1 and its good stuff, 2 strokes love it.. I found the ethanol high test to be fine if you run it frequently and don't let it set.. but its my last choice.
lately I have been running tru-fuel available at wal mart, farm and family and so, its pre mixed at either 50 or 40:1. Typically I run that in the tool that see less frequent action.. hedge trimmers, pole saw, and so on.
As mentioned, ethanol absorbs moisture like dot 4 and below brake fluid. if you have to store it for any amount of time, seal it up tight, keep it in a cool dark place and out of the sun..
The tru fuel come is a nice metal can that's easy to carry in the woods. I want to say its a 32 ounce can.. and has an anti splash nozzle over the mouth..