Hello everyone! New to these boards. Hopefully this is somewhat the right place to post this...

I have not backpacked in about 15 years or so but used to be into it pretty heavily. Fast forward 15 years later and I've gained interest in it again and got my 12 year old son excited as well. We are looking to do a short overnight trip next week. Middle of the week sometime, no set date but I imagine the trail wont be to busy. We not necessarily looking for any specific trail or hike to do just something short and moderate. This will be his first time out, and I would like to limit both days to about 3 miles. I was thinking of just parking at one of the gaps up in North GA and hiking to a spot. Problem with this idea is I am getting overwhelmed researching them all. All of that said here is my main question / needs:

Any spots I can:
1. Park (Toyota Camry) overnight, preferably along a well (relative in North GA) traveled road. I.e. blacktop
2. Hike out about three miles to a site.
3. Return to same vehicle the next day


Thanks for any and all replies.