When considering what is needed for the overnight stay after a day of kayaking, you need to decide what matters most. Unlike backpacking, you can carry more weight and take up more space when traveling by kayak. This means that it is highly likely that you will be able to fit at minimum your tent and sleeping bag. For this reason, your main consideration should be what kind of experience you want from camping. If your goal is to be closer to nature, a sleeping bag, hamock, bivy bagor with at most a quick shelter with a tarp. An extra space blanket and survival bag for extra heat and separation from the outside could also help. If you want to opt for a good, dry night’s sleep away from the swarms of bugs hovering by the water, get a tent with a ground sheet and a large rainfly (flysheet) which extends down the entire wall of the tent both for protection against the weather and bugs. Don't forget to carry a tent repair kit!