I found you can’t trap your way out of critter problems. So what is you catch one when 6 other raid your tree.
The only thing I found that works 100% is an electric fence. Not just your standard hot wires spaced every 8 inches, squirrels can jump through or jump on a post. They need a ground to get zapped. For my 100’ to 50’ orchard, I use 24 inch tall chicken wire with the bottom at/below ground level. Two inches above the chicken wire begins the hot wires. This keeps squirrels out.
We don’t know much about the poster yard/orchard.