Shameless plug here, I attend Thiel College in Greenville, Pennsylvania. It's a tiny liberal arts college, about 1,500 students total. I am in very small classes. My largest class is Western Humanities, a requirement for freshman and for graduation, and it's a large lecture hall MWF, but TTh we meet in groups of about 20-30 for discussion with the professor. I know mostly everyone in my class, and the campus is very safe. There aren't really unfamiliar faces, though I might not know names I have at least seen almost everyone by now.
The campus is pretty quiet, but there is always something to do. Our campus activities board plans great activities, like grocery bingo where you play bingo for a chance to win a bin full of groceries (free!) , wings and sings where they provide karaoke and free wings, and free trips up to NYC. They also have a shuttle that can take you into nearby Greenville, where we have a wal mart, fast food, and the best chinese buffet.
And of course, we have active greek life on campus. There are three national fraternities (Delta Sigma Phi, Sigma Phi Epsilon, and Kappa Sigma) as well as a local. Greeks know greeks on our campus, and greek life at Thiel boasts of a higher than average GPA and great retention rate.
We also have the Dietrich honors institute, which sounds like it would interest your son. A few of my sisters are in it, they love it. They're also holding 4.0's, though not without a lot of work.
And, best of all, they offer a shuttle to the air port for breaks, so you wouldn't have to worry about coming to Greenville to get him, he could fly home.
thiel.edu
Oh, forgot! I am a psychology major at Thiel. You leave with a introduction to everything, with the intent to head to grad school. We also have a neuropsych program. I love it, I think the program is very strong and I am recieving a great liberal arts education.