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There is a high chance of being recruited if the pre read was positive at schools in any of the three conferences you mentioned. Remember though, that recruited is not the same thing as offered. There are stages to this process. The fact that you have received a positive pre read means that you have passed the first stage. You are academically recruitable, and the coach is intrigued enough by your potential to have checked. It's the first big step, but there are several more to go yet.
Also, in the Ivy League, and if I remember correctly the NESCAC, the "pre reads" going on now are really just the coaches or someone in the athletic office taking a look at your numbers to see if you are within range for what they can recruit. I don't mean to make light of that process, and at many places where the coaches/admissions people have worked together over a number of years, these early pre reads can be very accurate. But a "real" pre read, meaning an actual look at your stats by an admissions officer, at least in the Ivy, can not be done by rule until July 1 before your senior year and before you have that pre read, the coaches will ask for all of your test scores, senior schedule and an unofficial transcript. I seem to recall a couple NESCAC coaches telling my son that this level review by an admissions official (the NESCAC coaches called it an "academic read") happened later in the summer/early in the fall, but I am not sure about that since my son did not go that far with the NESCAC schools.
I don't really remember how the Patriot schools did pre reads, if they do them at all. I do remember sitting next to my son when a Patriot coach asked him for his stats. When my son told him the coach just said, "You'll be ok".
In any event, the academic part for my son happened in four distinct phases:1) coach's pre read, 2) official pre read, 3) offer/accept, 4) application/likely letter.
What @sherpa said. My son had opportunities to go elsewhere for free and while he is not done yet, I haven't regretted a dime spent on Princeton. The opportunities afforded there are truly world class.
I would also echo the comments about financial aid. Princeton is embarrasingly generous, and I would not automatically assume that you will be full pay without even running it past the FA office.
I am a lawyer and a former scholarship athlete. Like others have said, you can be successful academically and athletically in college. But you are right that being an athlete, at least at the D1 level, involves trade offs. Your study abroad options will be limited to non existent, depending on your sport, you are not likely to have time for "numerous" other activities, etc. I have no first hand experience in D2 or 3, but I am sure athletics at that level also require a significant committment that will make other extra curriculars difficult to say the least. There is an old saw that is more true than not. You can be successful academically, socially and athletically. Pick two.
On the other hand, there are significant benefits to being an athlete. Put aside, for a minute, the life long friendships that come from sweating and striving day after day together. A lot of sports, particularly the more popular ones, have active alumni and "friends" groups that can be a tremendous resource for things like internships. And while I don't think that being an athlete helped me get into law school, I know it helped me land my first job. As my hair has grayed I have had the opportunity to hire a number of young lawyers and paralegals. I love resumes from former competitive athletes. It shows me the kid knows the value of work, is competitive, and understands that there is failure ahead as well as success. Those are very valuable traits that are not always otherwise apparent in a resume or interview setting.
At the end of the day, you should make your decision on what is in front of you. Do you think you will enjoy continuing your sport in college? Or are you ready to hang em up and try something else? Don't worry so much about the if-come right now.