The logistics would depend on where people were coming from. For example, for those in queens, brooklyn or upstate, people could meet locally first, then travel directly to either LES or to the first stop in NJ, which ever makes sense.
The LES meeting point largely would be for manhattanites who need need a ride. Those coming from Queens/Brooklyn naturally would pass through the manhattan en route to Jersey anyway.
But you are right about needing more coordination as people will be relying one another. I have already visited three of the shops and can confidently say there's plenty to see there. Its definitely different from our usual haunts.
I have a relative who owns a restaurant in hackensack (near one of the aquariums slated on the venue) so an indoor swap location is not a problem.
"I am Groot", the faithful protector