Your question is an inspiration. It reflects an attitude that we believe will not only breed success, but will bring you much happiness as well. It's true, nothing beats experience. It's also true that there is no match for having a solid education, coupled with the experience in a given field. This can be especially important if you decide to own your own business. As an independent businessman, it is not only important to be well versed in your particular profession or vocation, but it is equally as important to understand the mechanics of a working business. That is to say many business owners wear a variety of hats that may include, but aren't limited to, sales, clerical and mechanical duties.
If one has the good fortune, as you do, to pursue an education above and beyond high school, we say go for it! Regardless of what your plans are with respect to construction or a construction-related job, you should complete your formal education - it will help prepare you for some good hands-on experience later on.
There are some excellent construction-management and engineering programs available at many of the state colleges. In the meantime, you may wish to consider working for a construction company during summer break. Perhaps that will give you the opportunity to experience a little of what the industry is all about.
We agree that one of the best places to start in the industry is as a laborer or, as you phrased it, "from the ground up". You also should consider using this time to do some independent study on the subject. Once you have your foot in the door, and are working in the industry, there are a number of trade associations that have ongoing educational programs designed either for the novice.