H.W.
There is a group called the MOMS Club (a branch of MOMS club international) for Brunswick area moms. Contact Amy at ____@____.com for more info. The club has about 50+ members and they have activities most weekdays that you can decide to go to if you want. There are play groups for different ages, outings to local farms, etc.
As for babysitting, I don't know of any services, but you could always put a flyer up at Bowdoin. I have friends who use Bowdoin students and find them very responsible, though they don't always have a car which can be a problem if you live out of town. Otherwise, you could post on Craigslist and interview people.
Good luck!