Hello Maribeth,

I am sorry to hear about your experience with these pests. 
Here are a couple good resources to help you. You may want to contact your local government agencies to see if they have any plans for next year. 

Michigan’s site -

https://www.canr.msu.edu/ipm/invasive_species/gypsy-moth/

Wisconsin’s site also has good information, too-

https://fyi.extension.wisc.edu/gypsymothinwisconsin/pest-management-2/management-guide-for-homeowners/

Biological controls- https://www.canr.msu.edu/uploads/files/e2700.pdf

Some folks are tempted to try and trap the adult moth stage. Here is info from Extension on that topic

TRAPS: Pheromone traps are used by scientists and pest managers to detect new gypsy moth populations in un-infested areas. These traps, which are baited with the sex pheromone produced by female gypsy moths, only
capture male moths and will have no effect on the current or future gypsy moth populations. Setting pheromone traps in Michigan, where gypsy moth has been established for decades, will not affect the abundance of caterpillars, nor reduce defoliation this year or in future years.

This information was just distributed this week by MSU’s Dr. Deb McCullough

“Two gypsy moth items seem to be popping up today…. First, there are companies offering to spray Gypsy Moth (GM)pupae and/or moths. That is NOT a good idea – spraying now will involve conventional broad spectrum insecticides. Those sprays will not affect the GM population this year nor will it have much effect on GM density next year. It will, however, almost assuredly affect various native non-target insects and possibly other organisms.

Second – there seems to much interest in purchasing Trichogramma cards for GM biocontrol. Trichogramma are tiny parasitoid wasps that attack the eggs of Lepidoptera. They are cheap and easy to produce and there are several websites that sell them, including thru Amazon. However, Trichogramma will NOT attack gypsy moth eggs – not even if you de-hair the egg masses. Buying Trichogramma cards for GM control is a waste of money. But those wasps will attack the eggs of many species of native Lepidoptera (butterflies, moths) – not all of those will be pests! Feel free to pass this along to other people dealing with GM questions.”( end quote)

I am hoping that the high populations will begin to cycle downward next spring, and hopeful our spring weather will be wet enough to grow the biological controls needed to reduce the population.