Some years ago, Jim made me a couple of rod holders. Fishing at New Melones, they worked great. Soft ground, stick them in and your rods are angled in the right up and down direction.
Then you take Lake Camanche North Shore or Upper Blue Lake and it's nothing but rocks. Impossible to stick those rod holders in the ground without using a hammer, but they aren't designed to be slammed into the ground.
Once again, enter PVC pipe. Created a rack that I could use to gracefully allow me to get into and out of my kayak. 2" PVC pipe with a couple O rings. A ratchet strap with carabiners through a metal post hammered into the ground with sledge hammer and via two 1/2" holes in the top, fill with water so it sinks in about 18" of water. Voila! Easy ingress and egress to my kayak. No problem paddling. No problem fishing.