I don't know your entire itinerary, but we did an exchange into this resort back in 2000. We flew into Rome where we picked up a pre-booked rental car. The autostrada drive south was easy - getting up the mountain to the resort took awhile. We didn't make it to Pianeta Maratea til after dark, and it wasn't so easy to find, but I would pre-book a rental car in any case - and major airports will give you better pricing.
Although Italy is about my favorite country and we've traveled there 4 times now and can't seem to get enough

- we didn't especially care for the location of this resort (nor our accommodations themselves) to warrant a whole week, and checked out early, to head for the "greener pastures" of Sorrento and the Amalfi coast for more days than we'd originally planned. If you haven't already, you can read my review here on TUG, it's the negative one - but it's dated, things may have improved over the past 9 years.
That said, Maratea is a very pretty medieval town, there are some other hill towns not too far away, and there's one excursion we didn't take from there that in retrospect, I wish we had - the ruins at Paestum.
Beyond that: Pompeii, Herculaneum, Sorrento and the Amalfi coast are absolutely worth your time - a bit farther from Maratea and IMO you'd want to at least overnight.
I also wish I'd been more persistent in getting our unit switched - ours wasn't satisfactory in many ways, and the resort seemed half-empty. Our last evening at dinner, we spoke to some other guests who did get a different unit on request. You may get one you're happy with right off the bat, but if you don't, request a switch - and if they're not responsive, keep asking until you find a staff person who will help you. The upper apartments should have better views (the best feature of this resort), and if they're still having "animation" aka loud entertainment, the farther away from that, the better IMO.
Hope that helps - enjoy your trip!