Re: Gas from Kicker tank
many municipal recycling facilities take small quantities of old gasoline; environmental disposal companies will take large quantities.
In cold weather, gasoline stays "good" better than in hot/moist weather, which is why the folks here that live in cold areas have little problem over-wintering their gas.
I agree, either stabilize it if it's still relatively fresh, or add it to an empty car a little at the time. I wouldn't do it to save the $10, but for convenient disposal.