The cache is not at the above-listed coordinates! However, it is within one mile of that location.
The difficulty rating is a compromise... for some people, this may be as difficult as 4 (or even 5), while others will find this to be one of the easiest puzzles they have ever done. Here's hoping that you fall into the latter group!
You are looking for a mini Altoids tin. Log-only, please bring your own writing instrument. Please replace the log inside the plastic bag, and make sure that the plastic bag is entirely within the container when you close it, then hide the container exactly where you found it.
This should be a cache-and-dash for most folks. Terrain is rated 1.5 because it is not 100% wheelchair-accessible. Expect plenty of muggles at all hours.
Congrats to Warnock3d for being FTF!