So, you would have people who have never lived on a planet, arriving at a strange planet that they have very little knowledge of, and attempt to colonize it. Interesting concept for a novel, or a movie, but not the type of exploration I personally would want to be involved in. Not to mention 1000 people living in close quarters for 250 years. I see factions springing up, power struggles and maybe even war. Imagine war on a ship in space. Imagine what form of government, or lack thereof, would emerge on the other end. Because it's still human beings, after all, and I don't think the mother of all car trips is going to make us better.