You did not say if you had been looking at colleges. Assuming you have, you should look at the list of schools that you are interested in and see if they have fall camps or scout days that you could attend.
If they do not, look at other schools in the area to see if a coach from your list of school's is attending.
Also, now is a great time of year to call the coaches at the schools you are interested in to discuss their needs.
Are you playing for any fall teams? Give the coaches your schedule, along with other strong player's names on that team, and perhaps they will make time to come out and see you.
There are Uncommitted showcases offered for Senior Year players such as Perfect Game, but first its best to decide what will work best for you in terms of your college studies, and THEN look to the baseball options. Most schools hold try-outs for incoming students who were not recruited so you could position yourself for that as well.
Remember that it does not have to be D-1. D-3 schools will sometimes give the edge to a borderline applicant if they see your extracurricular interests, such as baseball. They want people who will stick around and pay them for four years!
So bottom line:
1. Select schools to apply to based on academic and lifestyle matches to you.
2. Review for baseball teams at said schools.
3. Look for camps and scout days at those schools.
4. Either way make contact with the coaches and tell them their school is THE school you have chosen for academic reasons and that you would LOVE to strut your baseball skills for them.
5. GET GOING TODAY!
Good Luck