can you bring your own stand up paddle board to the lake?

I did not see any sign that said you could not bring your own water craft or device.

Yes

Probably not there's no swimming in lake ralphin and spring lake but there's a lagoon I by spring lake side you can swim in there I don't think they let a paddle board in the lagoon but you can hike up the mountain a little ways and swim in lake ilsanjo and there you could use a paddle board only thing is it's probably hard to hike with the board