The noise doesn't seem to be an issue; as you said, it's only going to be printed to 5x7, and can easily be "de-noised" if necessary (ISO 3200 - I remember the days when we thought were s**t-hot pushing Tri-X to 1600!

). What I do see as an area of concern is the over-bright backgrounds, especially in the family, standing full-length shot. You have a group with all blonde hair, posed next to pampas grass with bright sun... why?
The pose is great; I think that's a really nice family shot ('though I might have turned oldest daughter a bit more to her left), but the bright/blown background is a real concern. If they were dark-haird, it would have been less so, but as-is... Two more stops of strobe and this would all have gone away.