I don't plan on putting any music on the iPad. I will put some movies - only enough for a single trip (so maybe a movie or a few episodes of something) and the apps. Would 16GB version be enough for this? I have a 32GB iPhone where all my music would stay. I would also have some books, but I know these don't take up much space. Photos, I don't NEED them on so if space was an issue I wouldn't keep them. Is 16GB enough?