Contact Bob over at Worldwide Marine Insurance.
Worldwide Marine Underwriters | Boat Insurance Agent Grand Ledge
He is an underwriter for several companies. Many if which specialize in Marine Insurance only. He can tailor a package just for you.
Previously I carried State Farm. It was an add on to my home owners coverage and I really didn't like that. I payed about 550 per year. Additionally, I carried BoatUS as a rider for towing and road service. It cost an additional 100 per year.
I see bob at several tournaments per year. Through another CDC members urging, I contacted him. I was blown away.
I pay 350 per year for far better coverage on a boat only policy.
I have 100% towing on the water (any water). Roadside service on my trailer. 300,000 in liability insurance (needed for tournament fishing).
Important verbage: My boat is insured for an agreed upon "replacement value". That value is 35k. That is boat, motors, and trailer. I have 10k worth of coverage on my trolling motor, electronics, life jackets, gortex, and other clothing. I have 10k of coverage on my rods, reels, and tackle at any one time.
I also carry "Underwater obstruction". Hit a log, sand bar, dead walrus, your lower unit is covered.
Whether someone steals a rod, life jacket, goretex, fish finder, or the whole boat, I am covered. Get in a wreck on the road, I'm covered. Some dirtbag hits me on the water, I'm covered. Myself or passenger get hurt, I'm covered.
NONE of the above was specifically mentioned in my generic policy through State Farm.
Hope that helps