Well I guess it depends on the boat and the vehicle.
My boat with a 20 HP merc. runs all day on about 2 gallons.
I'm glad it's all I have.
And my car gets 20+mpg pulling it.
I'd rather stay "little" and fish more.
I can go to Taylorsville and fish all day on 4 gallons total,
car and boat.
Sometimes less is more.