Il me semble que la partie basse sera accessible, mais pour les gradins je ne pense pas. Il vaudrait mieux téléphoner à l'accueil, ils sont charmants.

Au theatre oui, au musée non.

Si, è possibile fotografare

No, this is a Roman theatre!

Agree with all the others. Lovely place, well worth the visit and a pleasant town to hang out in for a couple of days. The hill behind the theatre is an a lovely park and if the weather is good well worth the climb for the view down onto the theatre and out into the surrounding country side. I traveled by train from avignon and it is just a short ride no need to book in advance. I think there are direct trains from paris but probably TGV so might be wise to book if you go direct from there. SNCF website will give you all the info you need on that

Rent a car, it'll be cheaper and loads more convenient. Parking isn't difficult and mostly free (if you don't mind a short walk :) ).

Their is municipal parking near by. It is across from the post office, La Poste. The above ground is inexpensive during the day.2 -3 Euro would give you 3 hours or so. Underground parking is also available there. I don't know how much it is. Because of the event, free parking may be hard to find. Some of the hotels are within walking distance. a few hundred meters.

There's a plan on their website, but it's not very good - just shows sections at a time. Higher you go the cheaper it gets AND more difficult to reach. Prepare to clamber up there! Not for the elderly. Oh, and take a cushion with you.

Best would be central about 8-10 seats up. Slightly to the sides will still be good too. The whole set up has few poor seats..