I chose 163 days because when I lived in San Diego, my apartment was right at the end of the 163. I tried to find some San Diego themed location here in the Atlanta area for that number. Balboa? Nope- 1 street in Norcross that has nothing but houses and 1 in ATL that's just a cul de sac. San Diego? Nothing. Vantage Pointe was the name of the apartment buidling, and also a neighborhood in Alpharetta- but it had no tresspassing signs all over.
So that means this cache is hidden in a place that nobody in their right mind would associate with San Diego.
This cache will take a little bit of a walk, but it's an easy walk and you pass 2 other caches on the way, so that's nice. Although you technically can be there at night, I wouldn't recommend it. It's probably not the best for little kids, although someone had set up a very tiny beach chair nearby when we were there so maybe others would disagree with that. The location has some cool history, so if you're into that, you should check that out.