Smelling Lake is only 6.9 acres, but has a maximum depth of 107 feet!! Good fishing can be had for cutthroat and eastern brook. The shoreline is littered with blowdowns so launching a raft may be dangerous. I recommend using a float tube. I haven't fished the lake yet, but will next spring when it warms up a bit.
I took the Scotty Road approach to this lake. Be careful to park just before the turnaround and gate.
An alternate approach could be from the Lime Kiln Trailhead. This is a much longer route, but better parking. I would bike in if you this. Much of the way is bike-friendly. Lot of spurs so refer to maps/google earth.
Congrats to Apen and cache ahead for their FTF!