Yes, it probably will be a long while, but it shouldn't be too hard to build another siding. Probably the siding should be in the Hillsdale area; I was thinking maybe between Hillsdale and Westwood, but I'm not sure about the room. I know that Broadway runs RIGHT along the PVL, and there are quite a few grade crossings between Hillsdale and Westwood sta. Maybe if they put the siding just north of the northernmost grade crossing at the shopping center, and the first grade crossing in Hillsdale. Between Hillsdale and Woodcliff Lake, it could probably be done, but I'm not sure about the topography along the right of way.
I'm looking for good places to photograph the day of the new service. My places will probably be Pearl River, Hillsdale, Westwood, and Essex Street in Hackensack(time permitting). This has nothing to do with trains, but how big is the business district in Pearl River?