If you're going on a hike I would recommend downloading or printing a map of the trail(s) you plan to hike (I personally used the App Alltrails). Reception can be spotty.
There are docents in the Nature Center at the beginning of the loop who are always around and willing to walk you around. It isn't on a schedule usually. Just stop in and ask. There are pamphlets and a numbered map to follow and explain all the highlights as well.
You don't need guide fir this tour. Don't spend money on guide. Just reach the park. Everything will take care itself.
You don't need one. Just grab more water and a map or a smartphone.
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