PA-14 looks good in the bed of your Ram!
I've been using a Harbor Freight
extender for about three years now (with many different kayaks) and I recently modified it to carry the PA-12. I removed a pair of Yakima LandShark saddles that were installed two years ago and replaced them with a boat trailer style bunk (P/T 2x4 wrapped in bunk carpet). This allows me to slide the boat on/off with ease and NO damage to hull. I carry the boat bow in/stern out so I can just roll the bow up and over the crossbar and then lift the stern, sliding the hull in far enough that I can remove the scupper cart and then slide it in the rest of the way.
I use a friction strap around the crossbar (not the end loops) and another over the bow of the boat.
IMO, this is the easiest way to carry a single kayak/boat if you own a pick-up....simple one-man loading.
BTW- I think my next extender will be the model from T-Bone
For transporting more than one kayak, I too invested in a trailer (SportsRig Micro trailer)....much easier then loading kayaks on roof & more fuel efficient!