If you’re a Mark Twain enthusiast and up for an adventure, visit Hartford, Connecticut. It may not be the riverside town of Hannibal, Missouri, where he grew up, or the storied California gold country, but it was his home from 1874 to 1891 – and you can say you’ve stepped foot in the place where he penned “The Adventures of Tom Sawyer” and “Adventures of Huckleberry Finn.” Guests are not allowed into Samuel Clemens’s home…