Camping fees have been slashed at 55 camp grounds across the state, including popular locations such as the Grampians and Great Otway National Park.

The changes, effective from December 18, mean that holidaymakers who have already paid for camp site bookings for this summer will get a refund.

Walkers enjoying the Grampians National Park. Credit:Parks Victoria

At 48 mid-level camp grounds (no showers, pit or composting toilets and mostly undesignated sites) the daily cost per site will be cut from $38.90 to $28. While at seven boating-based camp grounds daily site prices will fall further, from $38.90 to $21.