Your question comes at a time of social change, as you probably know. An abaya is not strictly required; ''modest dress'' is (whatever that might mean). I notice that most expat women still wear abayas in conservative parts of town, so perhaps they feel more comfortable that way. It's not warm enough at the moment to make much difference. As for a head scarf, my wife has never worn one, even with an abaya. Hope this helps. Perhaps post your experience so other people learn from you.

I do not know when it is open. Sorry.

Yes, there are, inside.

Absolutely! But only when dressed properly.

Bachelors are allowed. Friday opens at 4pm. Parking is under construction but you can park a few blocks from the museum.

It's free of charge.

Sorry, the only thing I know is that it opens at 4Pm and closes at 9. I managed to get there in the middle of the day and they were very nice and let me in.