RE Pinhoti - just me being finicky... its a National Recreation Trail, not a Scenic trail...
RE OMSP - WARNING! You may not want to use their backcountry site that is located near the crest of Double Oak Mtn! That is unless you like being startled awake multiple times during the night by the long echoing blasts of train horns! The tracks that this emanates from is all the way down by the Tank Farm exit (246?) the sound carries across the flat lands and on up the mountain side!
The train tracks are just one hill over along Hwy 11. They run parallel to the park for a good while.