I hiked the red trail loop. The trail is used for hiking and mountain biking. Easy trail to follow with good signs. Overall the trail was moderate and was a fair distance a little over 10 mile hike. Not difficult and pet friendly.
Several options available. RV hook ups, camp grounds, and yurt rentals. I did not rent a yurt but have heard good things from friends who have. Very clean camp grounds, if you don't mind a familes close by. Can set up next to the lake. Pet friendly and several children and families around. Ton of activities around stone mountain park.
Desoto State park has beautiful views, waterfalls, and caves to explore. The trails can be as easy or as hard as you make them. Plenty to explore, several different trails for hiking with some leading to caves and some leading to swimming and a waterfall. If you enjoy a swim, you can swim under the waterfall to the back side and watch the water fall. Camp sites are great as well and very clean. I set up my hammock and we had a tent as well.
Chewalca State park has more to offer than just hiking. There are several mountain bike trails of varying diffivulties. There is also paddle boating and kayaks available for the lake. Throughout the hike there are canopies and grills where families can hang out. The hike was easy and not very long. The trail loops around the a lake and brings you to a waterfall on the back side of the lake. The waterfall is easy accessible and you can get as close as you wish. The park is also pet friendly.