Here is a quick McCache at the posted McCoords.
Since McCord road is extremely busy at all times, care should be taken with children and pets. I would also suggest approaching GZ on the safe side of the barrier, if possible. You will likely be seen by muggles during your search, but they are likely too busy driving to pay much attention. Please try to time your retrieval and replacement of the container during breaks in traffic. You can always use the I am taking a rest and on the phone or texting ploy to be more stealthy.
Parking is probably best south of the cache near the gravel access drive to the trailer park. You might also find a spot at one of the nearby apartment buildings.