It would be safe to just call. So that there is no conflict for space. This park is notorious for having wedding parties there especially on a Friday.
No. The amusement rides are free right now as well
There are 2 shelter houses in the lower park and at least 1 in the upper part. Parks and recreation department can tell you any info you need.
I'd call ahead to see but there's plenty of shelters to use there and nice restrooms too
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