I visited Thompson Falls for a week with my fiancé and family and found quite a shortage of caches and many places to put them. This area is just down the road from where we stayed while we were there. This is a P&G and does not require trekking through grass or near the fenced area. The coordinates don't line up with the map, so stay near the road and use your geosenses!
You are looking for a small container with only a log. Bring your own pen!