According to this site: https://www.laparks.org/park/wilders-addition it says they have a full list of park policies located at the Angels Gate park office. Also, there's some downloadable information, in the link I provided, on weddings that you might wanna look at.
Check with L.A. parks and recreation. Thank you for asking. Smile when you say cheese.😜
The fact that this Park is open to the public means you do not need a permit the photograph anything. Your First Amendment right give you freedom to the Press which includes taking video and photos. The park is funded by state taxpayer dollars and therefore there is no privacy that can be assumed while in a public place.
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