As others have said, yes it is best to buy in advance during peak times. However you will be charged a $8 fee extra per ticket to book online. So if you are flexible and go during non peak times you will save some money by buying on site.

After the tour, you can self tour the entire gardens outside until closing, but no other interior rooms. There is an Imax movie included.

not on thanksgiving

There is a visitor center that is free (the movie requires a tour ticket). The castle is on top at the hills and requires any tour to get a bus ride up. Once you are done with the tour you are free to roam around the castle and villas.

Yes! You can.

Some of the 25ths, yes

You can wear whatever you want...and take pics where ever you want but you can't touch or sit on anything

Yes, video and pictures without flash are allowed inside and outside - as of 02-05-2018

Go to the ticket purchase area give them your information and you'll receive wristbands

They are open weekends and most week days. U just have to check their website for your info. And schedules.