Yes, you can bring your kids. Please let us know how many! (maximum 8 per couple)
Car rentals are likely standard, however, there may be a few automatic vehicles available at the Athens airport
Renting a car in Athens airport is cheaper than in Ioannina/Preveza
No, there is no Uber in Greece
Yes, there is plenty of parking space right on site of the venue.
Get a Greek SIM card in the airport at a VODAFONE (phone provider) kiosk. Your phone is unlocked (even iPhones). Phone/data plan packages are very cheap in Greece compared to Canada.
Greece is known for its hot summer! End of June you should expect warm weather, however, you may need a extra layer for the breeze by the ocean.