Residential parking can be a pain depending on where you live, but not all hope is lost. Miller Deck is usually the best bet to find parking, although the lots between Forest and Kresge are decent too. Parking if you live in Collins can be a hassle because there are only a small number of spaces beside it, so you'll most likely be walking from either Miller or the Trees. Lower campus parking isn't as bad, but no matter where you end up there, you'll have a short trek. If you choose to live on North Campus, however, the parking situation gets a bit easier. There are usually open slots near all four of the buildings, and coming to campus, your pass gives you the option of either a residential lot or the commuter lots, which are closer to the academic buildings. Commuter lots are extensive, though finding parking on Tuesdays and Thursday can be a chore, given the number of people who choose to take classes on those days.
Freshman are not allowed to have cars on campus, excepting special circumstances, but don't fret. There is a shuttle into Harvard and a loop around campus, or you can always make friends with upperclassmen. Cars are not a necessity at Bentley, as most everything on campus is within a 10 minute walk, although it is built on a hill. Once you have an apartment on campus though, you may want to consider bringing a car or living with someone who has one for getting the groceries, etc. The parking permits are free, but beware of parking tickets! Parking in the wrong lot for your permit, parking in incorrect places, or even speeding can result in troublesome fees. Permits are also available on weekends for visitors.