even if they designate a track as a "Tansfer" track none of us (the UTU or the BLE) are "qualified" on these tracks.
Which makes these tracks "off property work" it would have contractional, financial chaos.
As for access, the westward freight is out of service and Amtrak will not permit access through the sub track or their secondary track.
so yes the only answer is the montauk cut off secondary.
I walked those tracks recently.......
not looking too safe