So I used gabions for post anchors, it's been a few years now and still working great

Basically I welded up some metal anchor frames with some angle steel and flat stock, then drilled holes through them. I used those to put the 4x4 posts in. I put gabion cages under / over / around the whole mess. Keeping them level as I went up. I did some math and at 130mph the uplift was around ~1,040 pounds.  Each cage is around 4,000 pounds filled, but not all of that is directly over the anchor frames but I'm assuming at least 2000 to 3000 pounds are.

It's been a few years now and they've been stable as hell.

I'm in a remote area with lots of rocks but getting cement in is a pain in the butt.

My kids and I can always use the exercise.

Arid environment, galvan finish on the cages (from gabion1), they've held up great.

Rattle canned the steel to keep corrosion at bay.

I put cardboard or scrap thin wood down before the first big rocks went in to keep paint chips to a minimum.

All in I probably paid more, or at least a wash, compared to strong ties and portland cement. I had to pay for the cages and the steel but strong ties and cement aren't free either. Anyway, just some ideas for anyone else with too many rocks and a dry climate.

So one more to finish this up. I also did this for a grape arbor, and decided to take some of the spare 2x dimensional lumber and lay it flat across the tops of the cages. Not exactly uber stable that you'd be jumping around on them but plenty for setting down a drink, tools, potted plants, etc.