We have made this less of a needle in a haystack. Use the waypoints then it's a bit off the track but in a more distinct hiding place.
Most of the series is a cycle way so bikes can be used especially in summer. There is one section that can get quite muddy in winter but a mountain bike would be ok or you could walk that section.
This is a series of 13 caches connecting to our other series. You can do the circuit independently or as a figure of eight with "Totternhoe Tottering"