Thanks to all
Looks like the 10:30 would be a little too much risk.
I looked around and there is an 11:35 that we can book for only about $50/each more than it would have cost for the earlier flight.
That extra hour is worth the $100 to me.
We'll be renting a car so we can maybe control our own pace getting back to the airport and our rentla place is in the airport.
That checks one question off of my list.