If it's the track I am thinking of take a handsaw , chainsaw or good axe , there is a fallen tree about 1.5 -2 km in .
If you see lots of thick blackberry that blocks access to parts of the creek then those are the places I would test pan first.
Lots of people in this hobby just set up their gear close to where they can park their vehicle and dig where 45 other people did before them ...