There are many portable outdoor kitchen options that don't rely on an RV being present. Maybe one of those could be stored on the back bumper or in the back of the truck...
Outdoor Camp Kitchen PlansIt's easy to convert a dish tub or bucket into a functional sink. It's also easy to cut a hole in a table or countertop to make your "sink" sit flush. There have been many creative posts here over the years. I too like the idea of an outdoor kitchen, but have managed to live without one being built in just fine.
My floorplan easily sleeps six while still providing amenities like a bathroom and air conditioning. Extra storage is handled in Tupperware containers stored on the bunk over the main bed. Just thoughts...
