That looks like a sweet kayak.
My general suggestions would be:
Kayak cart. I know to some it sounds lazy, but every time I used it I am thankful. No matter if you are just making a short pull from the car to the ramp or having to walk it from the parking lot to the surf. The best kind imo are the hobie carts because of the wheels so i would find one with those hobie like wheels. They are not cheap but worth every penny. Avoid the carts with the rigid wheels. They are cheaper but they suck to use because they dig down into anything soft.
Personal Locator Beacon (PLBs) These give you and your loved ones some peace of mind that if something goes wrong you will be able to get help. We use these everywhere we fish whether it is offshore or bridge fishing and solo or with a partner.
Rod Leashes. We get some handmade ones from a local fisherman. Here is an example of the kind we like. They are cheap relative to what they are saving.
The Fish Grips. These help hold on to bigger fish and fish with teeth.
A dedicated set of fishing pliers. Any of these
Rod holders for those rails you have
A nice fishing hat. The KAVU Chillba is my favorite. They just have a headband you wear so air flows all over your head.
Some nice fishing pants. Light and strong ones.
My opinion on the other items suggested