The permit was free, but as a way of thanking them I sent a $50 donation to the Midpeninsula Open Space District which manages the particular park. Chris loved this park, and making a contribution in memory of Chris Sturtivant would be appreciated. (The donation link is in the “about us” menu.) Better yet, consider donating to the Monterey Bay Aquarium, or any other marine wildlife conservation fund. (See the comments for the notification address to use.)
For what it’s worth, here are the regulations and request form.