My mouth is watering at your snow peas. Too late for us to plant for fall. We have issues with powdery mildew on the fall crop. Your squash looks like the child of an acorn crossed with a zucchini or other cucurbit. Crazy produce coming out of seed packets lately, according to many others.
If you intend on saving seed, you can plant three singular different species of squash, and they won't cross pollinate. I.e. Curcubit Pepo, includes most summer squash, Delicata, acorn, spaghetti, Sweet Mama, dumpling.
C. Moschata - butternut
and C. Maxima - the larger squashes like hubbard, pink banana, turks turban.
Pumpkins can be one of all three species. Google to find out which.
One year I planted butternut, and Kakai pumpkin and zucchini. One of each species. No problems with alien offspring the following season.
Of course, if a neighbor has a patch of squash that you don't, and the bees come over to your blossoms....that's another story.