Wear clothes that you are comfortable in. Most any morning in Jackson Hole, even in the summer months, will be cool. But as soon as the sun pops up, the air temperature warms up pretty fast. If you are doing a morning scenic float, it would be a good idea to bring a sweatshirt or light jacket along that you can put on underneath your life jacket. If you get to the river and decide that you do not need a jacket, then you can leave it on the bus before you get in the raft.
We also ask you to wear shoes that you would not mind getting wet. We do our best to keep your shoes dry, but we are surrounded by water and feet sometimes get wet getting in and out of the boat.
Feel free to bring your own camera or set of binoculars. It is recommended to have a secure strap to hold them so that they do not fall into the water.