Galápagos Islands were declared National Park in 1959, due to its diversity, you are obliged to respect and take care of its fauna and flora. It is also recognized by UNESCO as human natural patrimony, so it is a protected area and one of the most beautiful wonders of the world.
You can carry up to 44 pounds of baggage to and from the Galápagos Islands, but you can carry little hand bags, photo and video cameras.
Due that Ecuador its located at the Equator, sun beams falls directly, so you will need sun screen, caps, and other products to protect from the sun.
Electric Power in Galápagos is 110/AC, so you can carry any electrical device you may need during your visit.
List of goods permitted to carry on your trips to Galapagos Islands:
Little backpack or hand bag (preferably waterproof)
Confortable shoes
Shorts
Pants
Short and long sleeve T-shirts
Light jacket
Bathing suit
Socks
Biodegradable shampoo
Underwear
Hat or gap
Sunscreen
Your medicine (if you are taking any prescription)