The Ellie McDoodle Diaries: Have Pen, Will Travel by Ruth McNally Barshaw
One girl. One sketchbook. One week with the world's most annoying relatives. When Ellie McDoogle's parents go out of town, she's forced to go on a camping trip with her aunt, uncle, cousins and baby brother, Ben-Ben. Ellie can handle mosquitos and poison ivy, but sharing a cabin with her crazy relatives? No way! From her aunt's many rules to her cousin Eric's constant teasing, Ellie needs her sketchbook to survive this family vacation!