Unfortunately, there’s no guarantee that they won’t return next year, especially if you grow squash plants again (or if your neighbors do). Adults overwinter in dead leaves and other plant matter, so make sure that you clean up around your garden to remove and expose any good hiding place to the elements. If they do return next year, consider taking a year off from squash and growing veggies that are less desirable to them, like leafy greens or root vegetables.
Unfortunately, there’s no guarantee that they won’t return next year, especially if you grow squash plants again (or if your neighbors do). Adults overwinter in dead leaves and other plant matter, so make sure that you clean up around your garden to remove and expose any good hiding place to the elements. If they do return next year, consider taking a year off from squash and growing veggies that are less desirable to them, like leafy greens or root vegetables.