FASAT is required for freshman, as I remember. You can bring your parents if they want to accompany you. It costs money for parents as they feed the parents lots of meals. They also feed the students, you are divided into various groups to meet other students and hear lectures, skits, tour various places, meet other students and professors and talk with professors, students and administrators, and then register and then go to the Bookstore for your photo and Buzz Card ID. Its a fun experience overall. Your parents may want to hear the lectures so then they need to pay for the food portion too. They separate students and parents for some of the lectures and information. There are some seminars about fraternities, sororities, the freshman resume/career seminar which is required for all freshman, and study abroad, and many other topics. Its reasonably informative. There is a lunch were parents can ask anything, (students are in a different room having lunch ) and lots of questions about safety in Atlanta came up last year, as well as workload questions and other things parents worry about. The GT police give one presentation to students and parents about safety too.
There are seven FASATS all summer long and for most majors, any of them should be fine. How registration works is they save spots in freshman subjects for each FASAT. You will be divided up by major and register with others in your major in a room together with some academic advisors. For CS, last year, for FASAT 6, there was some confusion, and it took about two hours longer than usual because I think of the high number of students who wanted certain math classes, and students waited to try to get enough credits so they felt comfortable.
Registration gets easier and easier as you learn the process and also as you are given priority as you go from year to year. Seniors have the most priority in signing up for classes.
If you are out of state, FASAT 6 and 7 lets you move right into the dorm, which is why those two are popular with international and OOS students. However many OOS students fly in for an earlier FASAT just to have a calmer experience.
FASAT 6 may be the most crowded, just because most students don’t want to wait until FASAT 7. I believe FASAT 7 is usually a little less crowded than 6, but that can vary year to year.
All the FASATS are exactly the same, so there really is no reason to pick one over the other, but if you can drive in, an earlier one may be less crowded.
there is an optional off campus experience for freshman, that my son did not sign up for, but if you sign up for FASAT 6, I think you can fit that in, or you can come early for it, if you are in an earlier FASAT. Its an overnight, as I remember at a YMCA like camp, near Atlanta, with upper classmen teaching you about all the GT traditions.