Due to the heavy tree cover, some of your GPSrs just won't get you
close enough. So I'll give you some generous hints that I hope will
still keep it a fun hunt for you.
Get on the man-made structure to the north west and turn to face
back toward where your GPSr says the cache coordinates are. The
straight thing on your right that you can touch lines up
exactly with where you should look for the cache (bird's eye
view).
It turns out that you can see the cache clearly from about 15
feet away while standing upright (assuming folks keep putting the
cache back where I intend and nothing else is added to block the
view). However, that fact is of no use to you since you
cannot reach it from that angle (and I don't think you'll find it
this way, either). So, just consider this a fun fact to confirm
after you have found the cache.
Use a stick to freak out any spiders and make them hide, then
grab the small container by feel. Courage now.
Put it back--waaaaay back--when you're done :)