You are looking for a small lock and lock.
From the gate, the old field road heads uphill east to the red trail where you can go left thru the gate and access the blue, green, red, yellow and white trail caches.
If you choose to do cache GC1FKHT first, you can follow the mowed paths north to a gate for the green trail and access the cache near where the green trail loops back.
You may find log footpaths thru some of the wetter areas, mud, rocks and roots.