it's hard.
i came in without credit card debt, but i did come in with UG loans. (the loans from college won't impact you, yet). all i saved coming to school was gone by second half (buying a bed, furniture..you name it). so you can't bank on savings, you need the loans.
however, depending on what school you go to , your refund check is maybe around 5 grand, for 5 months, if you take the max. that goes by really fast if you live alone, need to pay rent, make copies or buy books, pay bills, etc. even if you are frugal, most students i know are just scraping by until the next refund check. if you add in un forseen medical expenses or car trouble, and 900 for boards or fees..it hurts.
the best bet i guess is to stay at student housing. this way if rent is due first of the month and you don't get that check until the end, no one is posting an inviction notice on your door. buy food in bulk. if you don't need cable and you get internet with out it, get rid of it. get a roommate. don't buy food on campus, bring your own. limit going out to something big, like a movie or someone's b-day, or a school event. going home too takes a lot out of your budget. get on government assistance. it helps with food.
but like i said, even with all of this, there is not one person I know who doesn't worry about money, unless they have a domestic partner that works, a 5000 credit limit, or parents to give them money. some students work, but i wouldn't suggest that first year.
and if, like at my school, there is a delay in financial aid or they miscalculate your refund...the school pays itself first, your refund could take a month if things don't go right.
these are all things to think about but everyone has done it, and survived, albeit less comfortably than in college. just my two cents.