Do a search on the Forest River forum. There's a few really nice fifth wheel / kayak rack over the truck set ups there. Some homemade that are far better than store bought.
__________________ John and Rebecca Dickson Emma-13 / Little John-10 / Iva-7
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)
Some pretty good threads/pictures on here too. I actually have the front portion of the rack pretty well planned out in my head. My TV is also my plow truck. So, I am going to fab up a front hitch that bolts into the ears for the snow plow and run a load extender vertically to support the yaks at the front. At the rear, plan "a" was to tie the yaks down to the Trac-rac at the front of the bed. But the rack is to far back (12'6" from the front bumper - yaks are 13') and it's going to eat up some swing clearance. So, the existing bar and plow lights will need to come off during camping season. Not a big deal and it lets my toolbox slide forward another 3-4" allowing it to stay in the bed with the fifth wheel.