I think it would be ok to bring the snake to the park. I personally HATE when people bring their big huge dogs to the park, they scare me--but people do it any way, and I never give them weird looks. I just stay out of the way.
(Reason for fear: I'm 4'11 tall, and those dogs could knock me over so easily. Ouch!)
I would hope that others would extend the same courtesy. However, people are stupid. People are mean. People are crazy. You can't rely on them to be sane about anything, or to react appropriately--which would often be to not react at all.
I guess it's up to you.