Talk:The Dark Tower (episode)/@comment-82.69.95.145-20121104194320/@comment-5674726-20121106013457

Maybe Gwen and Elyan are going on a pilgrimage to the grave of one or both parents as a sibling thing, or else Arthur planned on going with them but something came up and he couldn't get away from the castle to join them.

Even if there are guards accompanying them, they might have them keep their distance so they can have some privacy, like Morgana and Uther on their visit to Gorlois' grave. If they are separated from any escort, it makes it that much easier for Morgana to take out the escort so Gwen's only protection is Elyan, who wouldn't be any match for her.