Shooters want more wilderness areas opened up to deer hunting, as conservationists warn the problem caused by the feral animal in Victoria has reached crisis point.

Recreational hunters are making their push for more land as part of the current state parliamentary inquiry into invasive animals on crown land.

They already have access to large swathes of public land across Gippsland, the alpine region and around the Grampians.

However, hunting advocates say they would like access to areas such as the Snowy Rivers National Park, Mount Buffalo National Park, Grampians National Park and will push for more areas in the Alpine and Baw Baw National Parks to be opened up.

"There's a lot of National Park estate that's closed to hunting without any logical reason," said Barry Howlett from hunting group, the Australian Deer Association.

"Anywhere where there's large areas of public land, [with] small visitation and deer it just make sense to allow us in there," he said.

Mr Howlett argued that opening up more public land to hunting would help control deer numbers, which have exploded in recent decades.

"The fact that hunting is not completely addressing the deer issues now doesn't mean that it can't play a really big role in it," he said.

Sambar Deer in Wilsons Prom for first time

Conservationists warn something needs to be done about Victoria's deer problem before it is too late.

Already open for deer hunting: Alpine National Park and Avon Wilderness Park

Alpine National Park and Avon Wilderness Park Baw Baw National Park

Baw Baw National Park Gippsland Lakes Coastal Park

Gippsland Lakes Coastal Park Lake Eildon National Park

Lake Eildon National Park Mitchell River National Park

Mitchell River National Park Tara Range Park

Tara Range Park Nooramunga Marine and Coastal Park Hunters' wish list: Snowy Rivers National Park

Snowy Rivers National Park Grampians National Park

Grampians National Park Mount Buffalo National Park

Mount Buffalo National Park More areas of existing parks where hunting is permitted

It comes as Sambar deer — the most destructive species — were detected in Wilsons Promontory National Park for the first time in July.

Sambar deer graze on trees and clear areas of native habitat, and there are fears they could have a huge impact on the Prom's forests.

"They would greatly damage one of Victoria's finest national parks. We should absolutely be worried," said Phil Ingamells, from the Victorian National Parks Association.

It is not known how many deer there are in Victoria, but it is estimated it could be in the hundreds of thousands.

Sorry, this video has expired Feral deer captured causing environmental damage

Government figures show hunters killed 58,000 deer in the state during 2013-14.

Mr Ingamells said expanding recreational hunting to more areas of crown land would not make a dent in the problem.

"[It also] starts to really impact on other visitors to our national parks. People don't really want their campground full of four-wheel drives with bleeding deer strapped to the roofs and things like that," he said.

He believes only proper research, biological controls and professional culls will curb the deer population - and that would take a significant financial investment from the Government.

He said at the very least, current trial partnerships between Parks Victoria and volunteer hunters being run in Wilsons Promontory National Park and Yellingbo Nature Conservation Reserve, had to be expanded to target more areas.

"We're dealing with our natural heritage. It's 500 million years of terrestrial evolution producing 100,000 remarkable native species in Victoria.

"We could be the generation that loses that. It's very frustrating."

Sambar deer have been seen in Wilsons Promontory National Park for the first time. ( Supplied )

Shooters and Fishers deny pressuring government

Conservationists believe the State Government is holding the inquiry to appease the Shooters and Fishers Party, which has two members in the Upper House.

Shooters and Fishers MP Daniel Young is also sitting on the parliamentary committee.

But Jeff Bourman, the other MP for the Shooters and Fishers Party, denied the Government had called the inquiry in exchange for his party's support on key issues.

"It may seem that way, but it's not really," he said.

Peter McDonell and Barry Howlett hunting on private property near Bunyip in Gippsland. ( ABC News: Jessica Longbottom )

"It's a case of, I actually think they've given this some thought, and one of the ways of doing this is to have an inquiry."

The party is strongly advocating for more public land to be opened up to hunters, especially for deer hunting.

"Locking these lands away or not allowing recreational hunters is not working. That's been seen by the rise in the deer population the rise in the feral pest population," he said.

Unlike conservationists, Mr Bourman believes recreational hunters alone can solve Victoria's deer problem if more areas are opened up.

"Poor old Parks Victoria is not doing a very good job, but they've had their budget slashed by a large amount, they're doing the best they can," he said.

"So the government's at a T-intersection: it can either spend more money, or it can allow people that want to help, to help, and do it for nothing."