Vacation

So I had an interview last week and got the call today that I was hired and they want me to come in tomorrow to discuss the schedule since I’m also a student and the interviewer specifically said to let her know of any days I need off in advance. I’m taking a vacation to the smoky mountains in May for a week. I was planning on requesting it off if hired anyways but now I’m curious if this will affect my getting hired. I am of course going to disclose everything but now I’m not confident. Anyone else have any experience with this kind of situation?