Are these too few extracurricular activities?

I play in a youth orchestra that rehearses once a week for 2 1/2 hours and practice violin for about 3 hours a day on the days I don't have youth orchestra, and 2 hours a day on the day I have my private lesson for one hour. I have a 4.0 unweighted GPA. I am also going to go with a tour group out of the country that will rehearse approximately 6 hours each month until Spring Break next year, when we actually go on the trip. Should I join a sport or club or something else...?