He is highly interested in sailing for the college and has reached out to the sailing coach whom he will meet in MA this summer. Would it behoove us to also visit admissions or would that be too much?
We do hear a lot these days about the importance of “demonstrating interest," and sometimes the admission folks who claim that showing love is not at all a factor in their institution's admission verdicts are not being fully honest. But, don't worry … your son is doing fine. An on-the-radar campus tour plus a meeting (and related correspondence) with the sailing coach are more than enough to prove that Georgetown is not just a passing fancy or a last-minute add-on.
In addition, your son should try to attend any Georgetown programs that are being held close to home. He should also make contact with the regional rep who covers applicants from his high school. First, he can check out this link to the “Georgetown in Your Area" schedule.https://uadmissions.georgetown.edu/visiting/your-area . Then, he can write to the regional rep to alert him or her to the fact that he is looking forward to attending a listed event or that, unfortunately, he cannot attend due to [fill in a rock-solid excuse here!] If the online schedule hasn't been updated (which is the case right now), your son should ask the rep about events that have been tentatively planned but not yet posted.
Your son can wait until the end of the summer to do this, because then he can also provide a brief synopsis of his meeting with the coach. This letter is also a good time for your son to ask questions, if appropriate. “Inappropriate" questions would include those that your son can find answered elsewhere (“What are the median SAT scores?"); those that require inordinate time and effort for the admission official to research (“Can you put me in touch with a student who joined the sailing team but then found it was too much work to continue because of the demands of pre-med requirements and the debate team?"); or that are clearly contrived to bolster the candidate's image (“Would it be unrealistic for me to expect to do 40 hours of community service every week and still serve as an admissions-office tour guide?").
Finally, you asked if a visit to the admission office would be “too much." It's not clear to me what your son expects to do there. If he has not attended an information session, he might find it worthwhile. But admission officers usually don't appreciate drop-in visits from families with questions nor does your son need to schedule an appointment to tell his admission rep in person that he's eager to apply Early Action. (A few admission officers would appreciate your son's enthusiasm, but many would view it as a time-consuming, suck-up move.) So if the purpose of the visit would be primarily to “demonstrate interest," then your son will have that covered without heading to the admission office.