While this complete list is optimal, it is not required for a successful experience:

Flashlight or headlamp

Camera Lenses - wide and long zooms

Macro lens or extension tubes or close up lens (optional)

Tripod

Tripod plate or L-bracket (connection from camera to tripod)

Camera manual

Cable release or 2-second timer

Photo backpack

Batteries and charger

Memory cards

Filters (Polarizer and possibly Neutral Density)

Rain cover

Laptop to upload photos or storage drive or extra memory cards

Microfiber cloths/cleaning kit

Sturdy shoes/Hiking boots

Waders or water shoes

Rain gear/umbrella

Layered clothing

Jackets/warm clothing

Hat

Sunscreen

Water bottle

Snacks

Phone & Charger