I have grown up in this county and it has a wonderful rich history lots of wonderful communities, parks, recreation and people. Unfortunately, the entire county gets painted with a wide broad negative brush from the media. I live in the Historic part of Hyattsville for the last 7 years, just south of University of MD. Our community is well connected for stay at home moms, full time working parents and everything in between. Its an old commmunity with tree lined streets, old houses, sidewalks, you can walk to shopping restaurants two metro stations, bus stops. Its an easy commute to DC by car train or bus. Its a city with small town feel if you can believe that. People are friendly and active in the community. Its a great place to live you should check it out. I feel safe with my kids at the park, walking around the neighborhood and even at our mall even though shopping could be better.
Other areas in the county to check out... University Park, COllege Park, Berwyn Heights, Beltville and Old Greenbelt Bowie.
As far as schools go, they face a lot of challenges. But schools to a certain degree are a reflection of the involvement of the community and parents. My biggest complaint about county schools aren't so much the schools themselves, its the parents. Parents who expect schools to basically raise their kids and correct behaviors and bad attitudes and on top of that teach them. If your are an intelligent involved and engaged parent, your kids will thrive no matter where they go to school.
Best of luck!