Mosher is on the far end of campus from your classes. Those “Northside” classes “Beaudreau” was talking about will be closer to the likes of Blocker, Mitchell Physics, etc. However Heldenfels is on the southside of campus so you will be literally 2 miniutes from it. I lived in Mosher and had no problems with time. Its like a 10 minute walk to the far ones. You would be better off living in Mosher so you can room with another engineering student. Chances are you will have the same professors, homework, and will both be busy (thus little partying), and you can get help asap.