Hi Kristyn...sorry for the LONG delay in getting back to you.
I had a midterm week, and then got ill, and then some family stuff happened all at once, so again, I apologize for the delay.
To answer your questions:
1) Greek life is the dominant social scene on campus. It's as simple as that. Personally, I'm not in a fraternity, and I still find plenty of stuff to do. There are lots of people who don't participate in Greek life, and finding those people to hang out with is pretty easy. People do all kinds of stuff here too, whether it's heading down to the Bowling alley, or checking out a movie or play at the Hopkins center, there's always something other than the frats to do on campus. However, be aware that the "Monday morning stories" all revolve around what happened at Fraternities over the weekend. They tend to dominate a large majority of people's free time on the weekends, simply because we're so far removed from city life.
2)Worried about moving into a small city? I'll level with you, that Hanover is a small, and by small, I mean really small, place. The population of the town is somewhere around 8,000 people, and Dartmouth is 5,000 itself. However, this is both a great thing and a negative thing for the college. The small setting really fosters a great sense of community and involvement on campus at Dartmouth. It's impossible to walk around campus without getting smile from someone you know(and I know that sounds really cliché, but its true), and we have great relationships with the surrounding community. People get invited to locals' houses for dinner pretty often. On the other side of the coin, it is tough to really get out in Hanover. The closest Wal-Mart is 20 minutes away (in a whole other town....West Lebanon, NH) and the closest large shopping mall is more than an hour away in Manchester, NH. (I understand that there is closer, smaller shopping areas in Burlington, VT and Concord, NH, but in my experience if people are making the trip, they'll usually go to Manch for the size and no sales tax at the large center).
3) I'm so glad you asked a question like this, as it's one of the best things about Dartmouth, and something which I can promise you that no other large university can offer. Because we're just a college, and not a university, you aren't competing with graduate students for great research opportunities, or internship opportunities. Combine this with the fact that Dartmouth is home to both the Dartmouth-Hitchcock Medical Center (ranked consistently in the top 20 in the nation for primary care and as a medical school) and the Dartmouth Medical School, and you have a plethora of opportunities. During my freshmen year, two people on my floor were observing surgeries. Another was shadowing a clincial psychologist during his work days. If you were to compare this with another "Crimson" presitigious insitution, located South of us in Cambridge, MA; you would find that to get slots like that in their Medical School, you would have to be a second year med student, maybe a very lucky first year. The jist of what I'm trying to get across here, is that any opportunity you want to make happen here, you can definitely do it, whatever your interest in medicine may be. If you want to work with a doctor, on patients, I promise you'll be able to find them at one of the two medical schools. If you want to do medical research, those opportunities exist in such an abundance, that its fairly common to find people working two research jobs, with a couple more on the backburner because there are so many great ones to be involved in, and it's so tough to pick.
4)Regarding the outdoorsy-ness of Dartmouth; being so out in the boonies, people here enjoy being outdoors, but not necessarily being outdoorsy. So the short answer to your question is no, you don't have to love being outdoors 24/7, but you should be comfortable having a snowball fight, or going sledding, or just going for a walk to crunch through some leaves in the fall. People also like to swim in the river in the summertime.
5)Our dining food is not bad, but definitely not amazing either. I think that any place you are forced to eat cafeteria food for years on end, will grow old after a while, but when you first arrive, you're bowled over with all of the options. Our dining services are consistently ranked pretty high overall, and for whatever it's worth, the food is always yummy. Just after a year and a half here, one wishes that they might have a few more options, you know?
So I hope those answer your questions, and sorry again for the delay. Feel free to IM me "paperbag989" on AIM(without the quotes), and we can talk more.