Often, the FS
does remove dead and green trees from campgrounds and surrounding areas for fire reduction purposes, and/or to make the area more visually attractive and easier to maintain.
However, these projects cost money and require an environmental analysis, and then some damn enviro-nazi is likely to sue to stall or kill the project
I don't agree with a lot of things the FS does, and in some cases they are idiotic and corrupt, but they really are caught in the middle of various factions when trying to actually maintain and improve the forests.
A suit like this is likely to just result in the FS closing almost all campgrounds.