Here's a great way to haul up to (5) kayaks plus the paddles, life jackets & other gear neatly in the back of of pick-up. Outfitters in our area charge $40 per kayak per trip to drop you off upriver ($200 a day for a family of 5). With this set-up, they only charge us $25 to drop us off at the same spot & to drive my truck back to the same take-out spot downstream. That saves at least $175 each time we go!
The pdf file includes the cutting list for this build. There are probably 1,000 more efficient ways to lay it out, but I really didn't have much material at the end. Feel free to contact me if you have any questions and please share pics & ideas if you build your own.