Yes you can for Free
I didn't have a room at this hotel and we were able to go to the top to take pictures without any issues. We also didn't ask anyone but we did have a drink at the bar. I don't think you should have a problem as long as you take your pictures and then leave.
If you don't make a huge production you might could get away with it? Will you be in your wedding attire or we're you thinking more save-the-date pictures? When in doubt ask for a friend 😜
Should not be a problem, but check with reception.
You would have to check with the front desk
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