again it falls under CHANOCH HANAR AHL PIDARKO. Each child is different and one has to know and understand his/her child before making this decision. Some of my children dormed out-of-town; others went to local Mesivtas. We did allow each child to give their opinion on whether they wanted to dorm. With 20/20 hindsight, dorming was right for some of those who dormed; for one, dorming was not the correct choice.
I agree that those who dorm generally have less distractions then those at home.
What are the warning signs that you should notice over an off Shabbos or Bein Hazemanim?
I am far from an expert but sleeping late, missing minyan, and not learning may be some of the signs. A reluctance to pack to go back to yeshiva. One of my sons would come home for Bein Hazmanim with his schedule of chavrusas for the time off from yeshiva all planned out and talk about what the yeshiva was planning to learn next zman.