Sandy, I'll tell you what I know for sure, it won't grow in Denver Colorado and it won't grow in Iceland. I sent it to friends in both places just to try and of course it just didn't survive. I don't know about your area; Colorado has a higher elevation and different soil than our normal and Iceland has a shorter growing period as well, so that doesn't give me much to go by.
On the other hand, don't worry about the 30 year part, mine looked like this after about 6 or 8 years, it's just that the trunks are now thicker. For this first year, I'd do exactly what you said, cover with mulch and give it protection. It needs a lot of sun, too, so be sure it's planted where it can get it. It also likes humidity and I"d think in your area it would get it.
If it's going to survive in your zone, then help it through the first year but don't worry about it the next year. If it loves it there and grows for you the first year, then I think it is a survivor. Mine survived the horrific ice storm of '09 and again a rough winter last year. Yours should too. Seems that the soil and the sun are the main things to consider. Mine have also been through a couple of severe drought years. No problem.
I have this one in my front yard and its support rotted away many years ago. It looks a little squashed growing low as it does, but even so, it grows and blooms every year with no support except its thick trunk.
If you need me, let me know!