Hey contourbs,
Ive done literally thousands of those palms, I too started off on a ladder ... took a fall and have spiked them ever since. They're a weed here, we cut them down like there's no tomorrow.
Some advice with working from ladder.
Put a chain or cable in the top of the ladder so it doesn't roll around the trunk on a flat rung.
If you can't have some one tending the foot of the ladder strap that in too.
Your ascent & descent on the ladder is one of your most vulnerable moments, so I used to throw a rope thru the head and take up slack on the ladder traverse.
Once up top strap in with a wire core lanyard. If going around the trunk is not good enough make sure you take in more than one frond.
At times with a ladder you'll have to go up 2 sides of the palm as sometimes you can't reach the rubbish around the back side. Other times the palm might have a huge bowl shaped head and you can't reach the big pods in the guts of it so you have to cut a hole thru the fronds and go up higher. either way, you'll have your rope and your lanyard (2 attachment points)
And finally, be careful not to drop debris etc onto your ladder.
I use a 1/2 inch wire core lanyard x 10 ft long with a Gibbs adjuster plus normal climbing line with a Blakes hitch.