With everyone talking about the great mileage these boats get, I wonder if anyone can share what the range of one of these boats is? I have 4 stroke 50 HP with 13 gal tank on my 16'. The one trip I really wanted to take I was discouraged to chart out yesterday and find that it is about 30 miles one way. Keeping with the rule of thirds, that would mean I would have to get at least 8 miles to the gal which I think is probably not going to happen. At the very least, I will need to carry about 10 gal extra with me. Thoughts?