There are porter services for luggage. You should contact your hotel who will arrange.
You’ll definitely have to walk up from the ferry through the pedestrian part of the village to the road in order to access any type of transportation since there aren’t any roads down by the sea. You can ask your hotel how far they are from a bus stop or if they offer a shuttle service. If they’re not near a bus stop ask them to arrange a taxi if there’s no shuttle. Aside from being high up in Positano looking at some of the reviews the hotel is up about 100 steps from where they’re located off the main road.
i've stayed at conca d'oro in 2012, and even from the base of the hotel, it's more than 100 steps up! we had a porter pick up our suitacase and bring it to the hotel which was great, but it takes a lot of getting used to walk up and down a few times a day. i've resorted to carrying a change of clothes instead of going back to the hotel to change. depending on your fitness level, please consider the stairs and your booking.