Helms Arboretum is a beautiful place for a picnic, or a wander amongst a huge variety of native trees. After a short car journey following the good gravel road (a 4WD car isn't a necessity), passing an information board, you'll reach a car park and a beautiful shaded area perfect for a mid-search sandwich break (hey, you deserve it!). The cache is located not far from here, nestled amongst one section of this huge tree library.
Sandals aren't really the go, because pine needles aren't very friendly, and like to stab you. Also, it would be best to enjoy this cache during the day, when you can see any obstacles in your way and darkness hasn't turned the area into a prime spot for a horror film.
Good Luck!