Summer/year-round work

Hi, I have a graduating senior and I’m a little confused on how things work with auditions. If you attend setc, uptas, a1s, strawhats, etc., and are lucky enough to receive an offer... how do you ask for time to wait until all auditions are completed?

I am also curious about on site location auditions- do places like the Muny, Wichita, the Fulton, flat Rock, etc., hold non-equity auditions ?

Finally, I would really appreciate any feedback on the unified auditions listed above or any others as funds are limited as is time.

Thank you!