Campers at Victorian state and national parks will benefit, with fees to be halved and $105 million tipped into facilities if Labor is re-elected.

At the Great Otways National Park on Friday, Premier Daniel Andrews promised to cut the fees and improve camping grounds, four-wheel-drive tracks and walking trails.

Labor is also promising to plan for a sea-to-summit hiking trail in East Gippsland and $11.6 million for local councils to help maintain and re-vegetate campsites.