My dad hunts Colorado every year rifle. . . Sometimes their group of 6 gets skunked and has a year with no elk, some times they kill 4 or 5 a year, but most years they kill 2 or 3 for the group
Their first year in a unit they get there 3 days early and scout escape routes and thick timber hiding pockets with water close, and look at where pressure will come from. Opening day they sit on escape routes and hell holes. . . For the most part it pays off for them, and they don't have to do too much walking after their first year once they nail down some good spots.
They spent 10 years killing 0 or 1 elk before switching strategies, many years without even seeing elk.
If it's not working switch it up! After 20 years OTC have you built any points for a limited entry unit? Nothing more fun then getting to chase low pressure elk!