It’s only been a day since you posted this - it’s not a super active subforum, and most of us current students are doing work. I often don’t look here during the week since I’m strapped for time. Of course you can double major, you just need to plan in order to avoid squishing your classes together in a few semesters. Class overlap can be an issue.
We had a discussion about dorms here: http://talk.collegeconfidential.com/mount-holyoke-college/1946044-current-moho-student-here-to-answer-your-questions-p1.html