Is there a published 2010 ferry schedule from Positano to Salerno for June/July? Any other ways to get from Positano to Salerno? Lastly, if we are heading to Rome does it make more sense to go through Naples vs Salerno? Thanks!!
You can take a SITA bus from Positano to Amalfi and connect with another SITA bus from Amalfi to Salerno.
Trenitalia trains from Salerno to Roma all stop in Napoli. Some are direct and some require making a connection in Napoli.
Your fastest route probably would be to take a SITA bus from Positano to Sorrento, a Circumvesuviana commuter train from Sorrento to Napoli, and a Trenitalia train from Napoli to Roma.