There is a program called High School Shadow that is sponsored by the Society of Women Engineers at Cal Poly,
Cal Poly Society of Women Engineers, intended for high school students (grade 9-12) and transfer students that are interested in engineering. This year it is being held Thurs-Fri, April 12-13. There is also a Women's Engineering Program Open House on Fri April 13 from 9-10:30 am,
Women's Engineering Program - Cal Poly, that my daughter and I are planning on attending. I am not aware of any other overnight stay programs other than possibly SOAR (Student Orientation and Registration) that occurs later during the summer. But there certainly may be others that I don't know about.