Many like to use tents. As a rule, you can bring your own sleeping gear, or rent it from your outfitter. Outfitters will provide you with a suggested list of stuff to bring. They will loan you a waterproof bag for your clothes and, usually, a watertight can for your camera and daily use items, e.g., sunscreen. Guns, pets, small children, valuable jewelry.
Meals are excellent.
You'll be served more breakfast, lunch, and dinner than you can handle. Many folks actually gain weight on these trips. Plates and utensils are provided. Outfitters do not normally provide alcohol of any kind. Passengers may bring their own personal poison.