We have outbreaks of grasshoppers every few years here too. The first time it happened was a surprise, but I was still able to save the new
trees by putting net bags over them. I wrote off the annual garden and had fun with a big sweep net and fed them by the handful to the chickens.....it was fortunate that I was raising some young birds that year. The taller the plants are, the more likely they seemed to escape the worst of it. And larger, established perennials and trees are more likely to come back successfully after a defoliation event, whether from frost, bugs,
deer, etc. At least here, it's only every several years, so you may be fine (to replant, plant a fall garden, etc.) once they clear out.