That “excess” money- check on it, you likely can’t get more than what is needed to pay. Perhaps this includes money for books et al. Remember dorm fees come with no meal plan- if you can even get into the dorms at this late date. Off campus living can be right at the edge of campus, sometimes closer to a needed academic building than a dorm.
I stand by my assessment of UW for different personalities. Introverts in sciences are vastly different people than extroverts in humanities- there is room for many types, both in personality and academic interests. I disagree with Natalie on her knowledge of campus living since she only has her circle of friends for fall and spring living. People with one social lifestyle may not be aware of those who do not share it- especially those busy with activities.