I believe it is gummosis disease. It is caused by environmental stress, mechanical damage and insects. The articles should help you solve your problem. Create the healthiest environment for the trees. Avoid improper pruning, mowing close to tree trunks, and compacting surface roots. Provide excellent drainage and don't over water. When pruning the trees, make sure you have good sunlight and air circulation. Gummosis of Fruit TreesWhat to do With a Bleeding Tree - Gummosis
Some years I get no fruit. Late freezes, hard winters, late frosts, no bees, etc... Then some years I get branch-snapping overload. Never had just one nice good year right down the middle.
1st two appear to be woodpeckers going after bugs inside the tree, maybe the last one as well. Some of the others look like different bugs eating a few leaves but not anything out of the ordinary. Humans aren't the only critters that like fruit trees. I like the part about asking your local extension agent as they 1) are professionals, and 2) should be aware of what's eating what in your area. If you can't get better pics put a few samples in a closed plastic bag. They can also give you recommendations on what to use to clear things up.