Amy, there is a thread on camping. I gave you a link to it. It is not unrelated at all. The thread could be found right where one might expect to find it - in the sticky thread at the top that talks about lodging and other common DLR questions. I gave a link to that too.
I have never camped at DLR. Someone else did and compiled the info. To the degree that it is outdated is the degree that other people have not taken the time to update or
create new threads with updated info. That is what these boards are for.
It would be wonderful if someone like yourself who is interested in camping would create some new content based on your research and experience.
Glad you found some other folks who gave you good links. We are big campers ourselves but rarely stay in places like those mentioned in the link I gave. We did two summers ago when we pulled our travel trailer from Colorado to Washington DC to NYC to Boston. The place near NYC was a parking lot - but very close to Manhattan where we wanted to visit. So we stayed there. Some people visit DLR the we visited NYC way I guess - and a parking lot is fine for camping. Normally we never stay in RV parks. We prefer primitive camping spots high in the mountains.
I hope you have a great visit and post your experiences!