I was in Stone Harbor the other day and drove right by the Wetlands Institute (wetlandsinstitute.org/) so decided to stop in. They do a lot of excellent work- rescuing the NJ Terrapins (turtles) during egg laying season when many get hit by cars, plus other sea mammals too. They educate a lot of kids on the value of the marshes and how much we need to preserve the marshes.
As far as what they offer to the public for touring, I was disappointed. However, I figure my admittance fee will go to helping save the marshes and a lot of creatures, so it was for a good cause.
Oh yes, Poison Ivy can grow into quite large shrubs and can have berries. The dunes that I walk through around here are full of it. Only got a bad case one year when I wasn't careful and it took months for the blistering/marks to go away. Otherwise, I never have a problem with it when I am careful.