I'm in ATB currently with Frostburg and am in the evening/weekend program. I work full-time, 5 days a week at a 9-5 job. I selected Frostburg for reasons similar to what you stated. I'm starting my 3rd class at Frostburg now, but the workload hasn't been to bad, just expect to write papers. Doing ATB was kind of a relief first semester, because it gave me an extra night off that most people had to be at CCBC on. You really just have to try and plan ahead and get the ATB stuff done whenever you have free time.
The program between CCBC and Frostburg is still relatively new, I think this is the second year, so it may be hard to find a whole lot of people to talk to. If you haven't already, go to one of the ATB sessions at CCBC and you can talk to someone from Frostburg, it may be helpful. Good luck!