Pugnochiuso, Puglia, is not too difficult to reach.
There are two (not so) close by airports:
The easiest solution, especially if you are 3 or 4 coming together, is to rent a car. Renting a car today (end of july) might cost you only 200 € for the whole period of the conference.
There will be a shuttle leaving Pugnochiuso on Sunday 28 in the morning (most probably at 9am), going to Bari Airport.
There will probably be a shuttle on Saturday 27 early afternoon, going to Manfredonia station (prior confirmation of participants going to the train station on Saturday) and, in case, to Bari Airport.
For those who are coming on Sunday 21st (Steering Committee members), no shuttle service is provided.