Just underneath #7 instruction, is a dark blue band. To the right is "upload campground", next to logout/login. Click on that to add a campground.
I believe you still have to register, even though you are registered on the forum, to add a campground or photo. I kept it easy for photo and campgrounds, and used my iRV2 sign on and password again.
So click login, register, upload campground and let us know your favorite spot
. We won't tell anyone else
Hope this answered your question as I understood it.