Bev, I think you'd have a good chance of success overwintering them in ground.
Tami, those are spectacular! Bev took the words right out of my mouth, I'm GREEN, LOL. They're blooming profusely and look very happy, so unless you'd just like to dig some bulbs to plant other places,....or send to all your Cubit friends, LOL, I don't think they require division. I've read that Amaryllis enjoy being crowded, and bloom best under those conditions.
Sandra, what is your area hardiness zone? I know several Texans who grow them in ground year round, but it's a pretty big state, LOL.