They do have a ranger on site to enforce the rules. You're supposed to get a permit for professional pictures, but cell phones should be fine.
Yes, unless you're taking pictures with a DSLR camera. Mobile cameras are accepted.
No you need to pay
Despite the signs near the entrance that say no photography, yes you may do that. But check their website for any restrictions.
Yes, it's a city park and the grounds are open to the public. No pets allowed but people yes. Hope this helps
No. The website seem pretty clear on that. Congratulations though.
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