I have no idea what is the crusing speed for a kayak. Is it possible to use deep diving lures from a Kayak.
leash/string up and clip everything to the yak using pad eyes, handles, bungees on your yak. Even your hook remover, fish grip, knife. Anything that doesn't float! Everything on my yak that doesn't float is leashed. After cutting one gill on the fish to bleed out the fish I toss it in the back hatch. During striper season I don't use a crate so i can throw fish in the back hatch. I use a crate when i go for fluke, sea bass, tog, weakfish. Never for stripers.
I also use a fish gripper to pull the fish onto the yak so I don't lose it. Also makes it much safer for hook removal. You don't want that hook going in your thumb.