Some NSW national park campgrounds could cost six times more per night if an attempt to standardise fees is adopted, and nature enthusiasts are concerned it will make camping unaffordable for many.

Camping costs in the NSW wilderness are likely to see price increases under a new tiered-fee system.

The social media campaign led to a shout-out by the NSW environment minister in parliament. It comes as the Victorian government was forced to backflip on free camping.