I'm a college freshman CS major at a pretty difficult university. The norm here is that every summer, one does an internship, then after 4 years, everyone gets a job or goes to grad school. I think CS is awesome--but I also think there's a lot to be lost by following a singular, career-driven path. Although I was incredibly eager to go to college, I'm now a little jealous of friends who decided to take a year off to travel.
So, to all you HN-ers: Did you ever take time off from your "life track" to travel (or something similar)? Was it worth it? When is the best time to do it?
I recommend taking time off as soon as possible. That way, when you return to college, your current classmates will still be there for 2 years while you meet your new classmates. Taking time off after college may also be an option if you are confident in your ability to get a job without the support that a senior might get from the career office.
Having said that, you should be sure that you will be happy spending so much time apart from all of your close friends (if you plan to travel alone). You may want to consider just a semester rather than a year.