Hi @peterg,
I would recommend to add Blink camera system to your SmartThings setup and integrate it with this integration by @RBoy . I have this camera system and I am very happy. You can also integrate it with CoRe; a community rules engine by @ady624 to get alerts and setup scare routines for your house. Including custom SMS and Push notifications.
If you choose to buy this camera system, they are holding a promo, I can refer you and we will get $25 coupon for our purchase minimum $99. Just PM me your e-mail.