Book in advance. Well in advance. That said they often have walk up camping available.
Being your snorkel gear. Plenty of places to stock up close to camp.
The falls are a longer trail then expected. Tell your wife your going or she may panic when your not back for a long time.
Get up early to watch the otters. Quitly exit your tent. There are often deer roaming around the sites in the am.
Best time to visit any Florida springs is during the week after schools have begun. We be had many all to our selves.
Bug spray. The nastiest most chemical filled one you can find. And soak in it. Helps a little. I know it's not always this bad but the last time was unbearable.