[ Military ] Open Question : army APG edgewood/aberdeen area? what the diffrence?

im going to maryland to see my husband which is in AIT. i have no idea what his adress is and what exact base he is on. i know that there are 2 sides to his base and im not sure on which on he is on. im going to be staying at the swan creek in. (i dont know what side that is on either) would anyone know what side my husband would be on? p.s. whats the diffrence between the edgewood and aberdeen area/? help me!!! anything will help. im clueless