The sandy beach is large so you'll be able to find your own space. Most people were gathered near the parking lot on Ocean Ave, which also has bathrooms. The further you walk, the less people you will see. Make sure you bring warm clothing, especially if you watch the sunset, as the temperature seems to drop quickly with the sun.
If you own or manage Carmel City Beach / Carmel River Beach, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.