I know you don’t mind spraying synthetic chemicals but you have young kids. The Re-entry Interval and Pre-harvest Interval will be something you need to read labels and follow.
Scot5 Smith has practiced mostly organic spray.
Here is his write up.
And Spray Amount Guides give useful info.
I started with organic practice but it was not as effective. Right now, I do a combo or organic and synthetic with better results.
Where you are is challenging to grow stone fruit. Besides bugs and diseases, late freeze is a real issue, too.
@thecityman , Kevin, has been away for some time. Not sure he will be back any time soon. He would be a good resource for you.