Hi, Blossom,
I'm in SW Wisconsin and I've had an Iceberg in a terraced bed by my front door for 7+ years. It does have blackspot problems, but it responds well to the severe pruning I give it nearly every year. In fact, that's about all I've done with it (I have 3 young special needs kids)and it manages just fine. It handles drought conditions fine and would probably do really fantastic if I actually gave it more attention. It's a good bloomer for me, despite the neglect it receives too. I haven't even gotten to the winter protection for the last 2 winters and it's still okay. It is in a protected spot though.

This year, my garden focus is the roses, and first on the list is dealing with the blackspot running rampant, so the Iceberg should be great this summer. Hope this helps!