Well, I live in Marietta (which is nowhere near I-95, by the way) and I feel perfectly safe living here and filling my tank. I assume you are coming down I-75South. There are several places to stop between Cartersville(about 20 min north of marietta) and I-285. The Town Center mall is at Barrett Parkway and has a host of restaurants and a few hotels. Chastain Road is one exit before Barrett Parkway and has some good restaurants & some hotels as well. Both of these areas are frequented by lots of families. The further south you go toward I-285, the iffier the location. I would not like to stay anywhere on the Delk Rd or Windy Hill Rd exits(lots of apartments nearby, somewhat of a medium-crime area.)
and it's true what they say about GA gas--it IS cheaper here!