If you're looking to add a little more excitement to your kayaking adventures, consider strapping your kayak or two onto the top of your tonneau cover. Not only will this provide a new perspective on things, but it can also give you a great workout as you paddle your way through whatever body of water you're exploring.
Of course, before you start loading up your truck bed with kayaks, there are a few things you'll need to keep in mind. First and foremost, make sure that your tonneau cover can actually support the weight of the kayaks. Some covers are designed specifically for this purpose and have reinforced crossbars that can accommodate the weight, while others may not be able to handle it as well. You'll also want to make sure that the cover is securely fastened down so that it doesn't come loose while you're driving.
Once you've got those basics taken care of, loading up the kayaks is pretty straightforward. If possible, position them so that they sit evenly across the width of the truck bed - this will help keep them from shifting around too much as you drive. Once they're in place, use straps or rope to secure them down so they don't go anywhere. And that's all there is to it! Now all that's left is to enjoy paddling around in new and exciting places - just be sure to take some pictures along the way.