I like the OP have used Campsite Photos quite often and found that it is a good resource for seeing the campsites in a park that I have not been to before,as stated sometimes the photos are old and things have changed,trees gone,rocks moved and untrimmed trees,but that is to be expected.
Another resource that I found is
Campground Views these are mostly short videos that show what it is like in the parks,the roads and entrances and such. I have found that it was very helpful in one park. The site was just right but the road into and thru to the site was not what I wanted to try.
I also use Google Earth to look at the place and zoom in as close as I can to get a lay out and the roads.
That would be a good place for the OP to post about the roads in this campground.