Does the home gardener need to worry about cross pollination of squash plants when planting several varieties?
Squash does readily cross pollinate. It won’t affect the squash that you are harvesting for the current year. If you saved the seed to plant for next year, it would not probably be a cross and not be at all what you expected.
I also found that they can cross pollinate within a species–basically. summer squash (pepo species) and winter squash (maxima species).