There are a lot of youtube videos about rigging milk crates but one of the best things you can do it put your tackle in sealed boxes that float. You can get them at Walmart.
I have pool noodles on my paddle and rod floats. Even my Iphone has a life proof life jacket. Everything else is mounted to the kayak somehow. If I turtled I would probably lose my pliers and that would be about it.
US Army and TXARNG 1984-2014
Gulf War 90-91
VFW Post Commander