Saving Squash Seeds

[AlittleSalt]

The squash in the pictures below are Gialla Nostrale squash. A friend here at Tomatoville sent me 3 seeds to grow. I'm trying to get seeds from them.

I think I have this right, but would like opinions on how to save squash seeds.

I let them grow until they won't grow any larger.
I let them stay on-vine until the skin got really hard.
Then cut it open, remove seeds, wash them, let them dry on a rack, and put them on newspaper to dry for a couple weeks.