Any restricted areas on where one can set up to sell artwork?

That I don't know but I have seen tents with things like that but the majority is food tents.

Need permit

You have to send your inquiries to the parks department

Online would suffice entirely especially after your permit setup in park...

You need a permit and register to set up your stall.

You need a permit. Parks Department is on sight

You will need a permit to sell.

I not sure but double check with the Parking dpt