How far are you looking to travel?
Here's two lists of gyms in Maryland:
http://www.fightfind.com/mtree/Acade...ates/Maryland/
http://www.bjj.org/academies/
Looks like there's some decent options, at least. You got a good variety of bjj, little bit of everything gyms, and kickboxing gyms as well.
As for the grappling schools, I'd just see which school has the best instructors for you, and then check out their facilities from there.
Enjoy the Maryland traffic
Edit: First opinion from scanning over the list, Maguilla's school certainly seems legit, not to mention that you can't really complain about getting to train under a certified (by Carlson Gracie Sr.) black belt.