Unlike the usual naming structure, Little Long Lake is not anywhere near Long Lake. While this is a remote spot and requires lugging in a (hopefully lightweight) boat, it is regularly stocked with brook trout, rainbow trout, and the popular hybrid, splake.
Because of the lake's geography, it's helpful to try mid-morning and mid-afternoon for high fish activity.
"TigerTrout2" by TyreeUM - Own work. Licensed under Public Domain via Wikimedia Commons