There is a fabulous book called Along I-75 by Dave Hunter, we used this on our last trip and it was amazingly accurate, right down to the speedtraps and detours around I-75 for traffic jams. It lists every exit # and all the restaurants, hotel and shopping for each exit. You can plan ahead if you see your fav restaurant.
I also would time my trek through the border crossing at an early(2-4am) or late evening, except for Fri and Sat. These seem to be the easiest times to cross. We left at 4:00am and live 20 min from the border. We also stopped in Dalton Georgia and loved it! I would leave early the next morning though, to beat the Atlanta traffic!
There has been an announcement on the news locally about stricter border crossings on the American side after Jan.31, which could result in longer wait times.
Good Luck and Have Fun