Rigging a kayak is fun BUT be careful on how many holes you drill. Use a quality silicone on everything. I use Goop Marine because it sticks better than regular silicone.
-I think the hand paddle is a necessity.
-I've anchor and drift fished a lot and never had a use for 2 anchor trolleys. I will say having an anchor trolley on the same side as where you keep your paddle doesn't work that well.
-I've installed lots of lights on my kayak including LED strip lights. If I ever do it again I won't drill into the kayak and permantly install strip lights. I'll install the lights on an aluminum strip of metal that I can mount to a utility track is some way and hang over the side. I don't use them much and they don't stick well at all to kayaks. I am constantly having to go back and re-glue them with Gorilla glue.
-For a nav light to me the ones you buy just aren't that bright. You can build one for at least half the price and it will be 10 times brighter. Here's one example- https://www.youtube.com/watch?v=60CO4z7E-9A&list=PLgBJYIEYxKQa_vxMmBNgM1_hIB4XyHA89&index=6
-fish finder w/GPS is a must IMO. The Navionics card also helps as well as having the Navionics app on your phone.
The one thing I have installed that comes in handy is a USB charging port. When I use apps on my phone I can go through some battery. This comes in handy in keeping my phone charged. Also if you use an action camera you can charge it too. Keep this in mind when you select the size of battery for your fish finder. I have a 17 AH battery but I have a lot of lights and a FF. A 12 AH will give you plenty of juice to run most FF's and a charging port. https://www.amazon.com/LiDiVi-Water...;qid=1563981472&s=gateway&sr=8-5