The state government is set to unveil new rules allowing developers to build in some of Victoria's most pristine national parks - with a proposal being drawn up for a hotel and other ventures on Point Nepean.

Environment Minister Ryan Smith will on Sunday release long-awaited guidelines paving the way for new accommodation, restaurants and activities in national parks that used to be off limits, such as Port Campbell, Wilsons Promontory and the Grampians.

Development target: Port Nepean National Park. Credit:Ken Irwin

Under the guidelines, developers would be required to undertake a five-stage approvals process - including public consultation - before gaining a lease. They would also be required to prove their proposal was environmentally sensitive and could generate a ''net benefit for the community'' before the minister signed off on it.

Fairfax Media has also learnt the government is working on a new master plan to redevelop Point Nepean National Park, with a boutique hotel, improved walking trails and a central visitor information centre all options.