PLEASE READ THE INFO ON THIS PAGE - IT WILL MAKE YOUR LIFE EASIER!
So I thought I would try something different (again)! You can only see the whereabouts of half of this series of caches, and that is because I have set it up as a set of 10 traditional caches and 10 (yes 10) bonus caches - one for each traditional.
The concept is simple - find the 10 traditional caches in the normal way by following the trail in numerical order and each traditional cache holds the co-ordinate information for it's own bonus (so trad 1 has the info for number 11, the first bonus, trad 2 has the info for number 12, the second bonus and so on), and before you know it you will have the co-ords for the second half of the trail, and the way back to your car and 10 more blue question marks in the bag!
You're welcome! 
The first ten take you to the trig point and the highest point on the walk and the second ten will bring you back to the car. Simple!
As usual the woods can be muddy at times so you will need decent footwear, there is a car parking waypoint for you (roadside or pull-in next to the enigmatic Lodge House ruin) and, just to let you know the walk is decent length at about 7 miles, just so you can work out timings if you need to (it'll take around 4-4.5 hours at a decent pace I reckon assuming you don't have masses of trouble finding the caches).
I have added simple directions on each of the first ten cache pages to help you.
I have rated the terrain for each as 2.5 as a general idea for the whole walk but they will obviously vary a bit depending on time of year and whereabouts you are on the walk etc. Cache difficulty is rated per cache but the bonus caches are all slightly higher due to having to find the position in the other trads.
Have fun!
Placed in accordance with the Natural Resources Wales guidelines.