The ROCK HUNT SERIES is comprised of 18 geocaches (16 regular caches with two mystery (puzzle) caches thrown in for more fun).
There are multiple entry or starting points and all caches can be accessed from one starting point although you will be doing more hiking/walking. Many of the caches are close by to established trails.
Attempting to do the caches in numerical order will result in extra walking/hiking and is NOT RECOMMENDED.
Suggest you look at the Geocaching maps or Goggle Earth and develop a plan of action prior to starting out.
I would think that all caches could be found in 4-5 hours.
HAVE FUN!!!