I really like Mr. Goldberg. He's so entertaining.
My intent of requirement #2 is to avoid being an 'ice toting freak' before every darn trip. Recharging a battery overnight at home in the garage is totally do-able.
It will be a tightrope to walk to gain any efficiency. In my case, I'm not too terribly concerned with
some extra weight, as I do very little driving in town (stop and go) during my commute.
Trik found he could drop 300lbs by removing the rear seat and interior, so there's always that.