You are looking for a small container big enough for trading items but too small for a pen so BYOP. There's nothing special to this hide, just a typical cache with lots of hiding places. I drove by this place while working and figured it was taken but it wasn't, so I took it. Have fun and good luck.
Congratulations to DEGOLDY for the FTF!
There's no where to really park but there's very little traffic except around 5pm.