you can buy a clear siphon hose with the pump bulb to start the flow at the auto parts store so your not doing it the old fashion way
I've been doing it that way for some time now and there really is no danger unless you smoke or something stupid like that ,just keep the end of the hose about an inch above the water
I'm not sure if a water seperator would capture the ethy or if it would let it pass how much do they cost compared to the free method
anyway for the small amount of gas you need for a weeks flying it doesn't take that long two jar fulls and you have a 1 1/2 gallons of pure gas