A commenter asks about Broom Tree for those near SD. It is a recent effort by the Catholic Diocese of Sioux Falls since 2005. The director is Father James Mason and he is a holy priest with a gift of preaching and direction. The highlight of their offerings are the Mens and Women's silent retreats offered according to the Spiritual Exercises of St. Ignatius. No antler prancing here.
They are also available for outside groups to come in, though with discernment on the directors part- i.e., no freaks!
It is in a beautiful part of SD, glacial hills all around, deep quiet, and they have done a great job to bring in beautiful art work.