OP, all of the schools you have listed are well established and students who graduate from them are accepted into medical school. If possible, visit all the schools to which you are applying, but only visit after having a long talk with your parents about how college is going to be funded.
And it can be a tough decision making process, deciding which school and what major. You will no doubt do best at a school at which you are comfortable and in a major you like.
And it doesn’t need to be near to or attached to a hospital; there are plenty of volunteer opportunities out there in other locations. And the 80% is a fiction; it has no basis in actual data.
One potential issue that has been highlighted is the difficulty in obtaining shadowing opportunities, as some physicians-understandably-are reluctant to participate. I know my applicants had difficulty in this area but were persistent and were able to participate in the shadowing hours.