They winterize end of October but yes you can. There is no water and such in the campgrounds. I confirmed with BLM. You can call number on website. They return calls pretty fast. Yes water way down.
I believe you can it doesn't say when you can or can't only way to find out is to just go.. the water level is low and didn't get any bites for fish https://www.blm.gov/visit/steck-park
I'm not sure sorry not much help
Thanks! Your answer is awaiting moderation.