This is a list of colleges that offer overnight visit programs for high school students. Most are free. Programs are listed by deadline.
September
Colgate University
Vassar College
http://www.smith.edu/admission/visitcampus/
October
Trinity College
Wellesley College
http://www.smith.edu/admission/visitcampus/
november
http://www.smith.edu/admission/visitcampus/