I think what you've got there will work fine.
You've probably seen these before, but for what it's worth...
This is a collapsible anchor with a half twist locking collar. It weighs 3.3 pounds and is just shy of 12 inches long.
We sold these for several years ( as did many fly shops ), but I honestly couldn't tell you what one costs today. I found this one on a hike into a lakes basin, during fall drawdown, along with a half dozen sets of Ford Fenders.
Good Luck, Dave