I agree with what Stealthee said, and the roadtrip should help ensure the battery gets a full charge. I wanted to chime in though to say that the typical expected life of a lead acid battery, which until recently has been the typical battery chemistry in cars, is about 5 years. So if your battery is 3-4 years old, it's not "somewhat new" but rather something you should expect to replace in the next year or two.
-Rod