looks good i have the same setup at my place, but its not on its own platform like yours. We have ours attached to the privacy fence so its up against the house and out of the way but in sight so we can see them when we come home. Looking good bro!
When you built your storage rack for the 2outback kayaks did you use 2X4's or 4X4's for the support cross beams?
I'm going to built one for my 2outbacks and cannot tell from the photos if the support/ cross beam for the upper kayak where 2X4's or 4X4's.
I built wooden racks with wheels - I can roll them around in the garage as needed or out to the truck. They are conveniently at the same height as the truck bed of my F150. This really minimizes any heavy lifting...