what do i need to carry in my boat to be legal.

Idaho Parks and Recreation enforces boating rules in Idaho.  What you need are:  a fire extinguisher, properly rated life jackets for all people in your boat, a whistle or horn that can be heard at a distance of 100 feet, and your current boat registration with hull sticker and ID numbers.   If operating at night, you must have a red/green light or marker lights on bow and white light on the stern. Additional items you should have include a throw rope, emergency water and rations, extra waterproof clothing, signaling device/flare and of-course - your current fishing license and pole.