Yes, I know I'm a little OT here, but I am packing for Parowan

I recall someone once telling me that extension cords larger than 14
gauge (maybe he said 16) are a waste of money because the plugs at
each end are not rated for anything higher than what a 16 gauge wire
can provide.

Is this true in general?

I want to pack a 50 foot extension cord to use with the motorhome (on
a 20 amp circuit) and I want to get something "gauge appropriate".

-ted/2NO