Rocky River Road runs through farm land, forest land, conservation land and eventually leads to Mount Campbell. There is a public access easement as far as the locked gate. Check the conditions of access and if for any reason access is restricted, leave the cache for another day. If you want to go further than the locked gate, you will need to obtain landowner permission first.
The road is unsealed and rough in places but unless your car is particularly low slung, you shouldn't have too much trouble getting this far. However, as the sign posted here says - the road is steep, rutted, slippery - it's 4WD terrain from here. Anyway, if you've gotten this far and decide to go no further, no worries, there's a cache right here.
The cache is a 400ml sistema with log, pencil, eraser, sharpener and room for small swaps. Please return carefully and ensure that the cache is secured in its hiding place.