If you're in the "sewing zone" and the fabric is all out and getting cut anyway, then just knock them all out now.
That's what I would do.
If gender/color isn't an issue, at least get all the tops done.
You can always quilt the 3rd one later.
In a perfect world, rolled would be the best for storage.
But if you gently fold it, without a lot of weight on top, out of sunlight and dust, it will be fine for years.
And congratulations!