Don't just do it for your fishing stuff. Do it for your entire house contents.
My son and his family lost their house in the Washington, Il tornado in November and now must remember everything in the house for reimbursement.
He had a very extensive woodworking shop in the garage and has had to spend hours and hours remembering all the tools. The big stuff is easy but all the little stuff is hard to remember. How many clamps, screwdrivers, wrenches and on and on.
You don't get fully reimbursed till you actually replace an item and show a receipt, so keep that in mind. If you have 25 fishing rods you won't collect coverage until you replace them.
So, keep pictures or DVD's or videos or something and keep them updated and in a safe place. Don't rely on a fire safe box in the house. Keep them at work or better yet in a bank safe deposit box. Also, make sure you have replacement value on the contents.
Dave