What a pain, James! Once when I was trying to protect my figs from both birds and beetles, my daughter sewed some big bags (sleeves, actually) from a mosquito net-like material. I slipped each sleeve over a branch and gathered it around the base, securing it with a twist tie (the other, open end was closed with a clothespin for easy access to the fruit). I realize we're giving advice about locking the barn after the horse is gone, but if you could find some suitable bags before next year and then gather them around the trunks, maybe that would foil the new hoppers hatching out under the trees.
(By the way, for anyone wanting to try this for bird protection, it didn't work--they pecked holes through the bags.)