I see there is already a quad bike size track over the dirt mound blocking the road.
A few serious 4x4 attempts or 30min spade work and it would be open again

But seriously - If I had to pay $5 at the gate somewhere to get better access, I certainly would.
When we spend so much on petrol, bait, gear and all the "necessities" of our hobby, paid restricted access would be a drop in the bucket.