Classical Trumpet performance undergrad, applying next year. Advice on tryout lessons, auditions?

Seeking advice from anyone who has recently been through the application process for classical trumpet. Kid is willing to go anywhere in the US or Canada. Me, I’d prefer he stay in the Northeast, but I’m willing to send him where he needs to go. I was expecting that he would do tryout lessons in late August, early September 2020, but now I’m hearing that this should be done in spring of 2019 - and kid has not a free minute until AP exams are done in early May. We will get help from two trumpet professors in compiling a list, but I’d really like to hear about the process from a student or family that has recently been through it.

This is the best place to start, of all the threads on CC: http://talk.qa.collegeconfidential.com/music-major/258796-so-you-want-to-be-music-major-one-familys-experience-p1.html