Volos is a military airbase which allows civil a/c to use it's very limited ramp facilities. The runway is plenty long and can accomodate any of the usual IT type aircraft, certainly up to B757.
Ramp space is extemely limited and only two a/c will fill the ramp. No idea where the terminal is as a bus collects and dispenses our passengers.
Controllers are usually accomodating and will let you choose your arrival and departure if they aren't busy and subject to co-ordination with Macedonia control. I'll be flying there from Skiathos again on Friday.