Often, it's easier to give privacy than it is to find it. This is often true in the great outdoors. If you can't easily find privacy then it's good to have an attitude among your group to give privacy instead.
When stopping a raft for lunch at the side of a river there may be no cover at all. A handy phrase for how to give some privacy when you needed to go pee was 'skirts up, pants down' — girls go upstream, boys go downstream. Or try finding some privacy when you're roped in a group of six walking up a glacier all day where you can't unrope — in that case, it's boys to one side of the rope, girls to the other.
You can give privacy almost anywhere even when it's near impossible to find it.
I was taught this by the excellent river guides at ROW.