I only know of Dublin by passing through but it's your typical rural county seat type town. In other words a good place to visit and generally safe. Like all small towns there are bad seeds, usually drugs, but a visitor would have to go looking for that sort of trash.
Macon is much the same though larger as it was once a thriving city and manufacturing center now much declined with the loss of industry. Outside of a democrat government it has fared better than many other cities in similar circumstances.
Lots to see in the area if historical sites are your thing. Macon has the Ocmulgee Mounds which is a must see, several house museums, the Big House for fans of the Allman Brothers, for civil rights there is the Harriet Tubman museum and a Blues HOF. There a small but decent science museum/planetarium in town as well my younguns enjoy it. As said there's plenty of craft eateries if your into that scene. I much prefer the local BBQ and there's several good ones around and the best old school meat and three cafeteria style in the area is S&S Cafeteria with several locations. Fishing can be done in town with a couple parks/boat launches in town on the river. Just south of town is Bond Swamp NWR with a boat launch and walking trails. East of town is a big flea market. Head west to Roberta to Dickie Farms for the last of the season peaches, they have converted the old cotton mill into a packing plant store with fresh produce and peach ice cream. Next town up on 75, Forsyth has Hamlin Farms for fresh produce as well.
Not far from Dublin is Milledgeville the old state capital with several original buildings/museums. Griswaldville isn't that far away as well.
If you happen to find yourself in the Vinesville area of Macon (the Big House) watch out for Vinesville Ave. It has reversible lanes in sections watch for the lights to tell you which lanes are open or closed. And if traveling through the 75/16 interchange be aware that it's under construction and attention needs to be paid to signage as they are currently rearranging everything, they might finish it someday. Otherwise 475 is the better option to bypass everything if going north south.
Almost forgot, Macon does have a Bass Pro Shop off the Bass Rd exit.