W&M is smaller than many people think. It is also a state university, though many think it is private. About 5400 undergrads I think. Curriculum is limited to liberal arts, business and education. Reputation is national; considered among the elite schools.
Baseball there had a checkered past until Jim Farr arrived and built a real program for the first time, through the '90's. Their stadium was a big step forward and is still very good for a CAA program. The team has placed several in MLB of late, including Chris Ray, Bill Bray, and others.
JMU was originally a women's teacher's college, but through the 1970's it transformed into a major university. I think it has about 14,000 undergrads now. Strong business and education majors, also communications I think. Baseball has been building there for a long time. JMU just cut several men's sports due to Title IX issues, but baseball was spared. They have an All American on their roster this year and seem to be building a winning tradition. Sports on campus has gotten a boost from the football team, which won the I-AA national championship two years ago (though they sure blew a lead last night!).
Both Harrisonburg and Williamsburg are small town atmospheres, though W&M is in the middle of a tourist trap for sure.