Not that it's any of my business, but I'm not crazy about the idea of you driving down to Baja and back with the kayak inside your truck. If you get an aftermarket roof rack you can potentially run a cargo pod and the kayak side by side on the roof. An alternative is longer load bars or a skinny cargo pod + j-racks on the factory load bars.
You're starting to gravitate towards overland expedition style of thinking and if that's the case you should really check out the Expedition Portal forums. Lots of parallel thinking going on over there.
Are you familiar with the Tiger Moth Trailer?
https://taxaoutdoors.com/ultra-light...amper-trailer/
If I was adventuring solo, or with just my wife, I'd probably invest in one. Load bars on the roof to accommodate a kayak or two as well. I'm just remembering no trailers for the SENTRI lane?
Congrats on your new rig!