I’m surprised these drug lords havn’t adopted something from the PLO or other groups that send hundreds of rockets into Israel, with some electronics and small mods these rockets can be steered, and I know for a fact the viability of building 1/4 scale RC aircraft that can operate with an on board camera. They can fly across the border and literally drop the cargo and return just like a bomber run. Or just go full scale.
Since our gov’t openly promotes drug smuggling (the 500 lb. “catch and release” rule for grass brought in by land ,, tons of cocaine shipped in by rail, see the “rite rail” congressional testimony) and I need the cash I’d be pleased to offer my services on a one-time basis for $$$,$$$.$$ and I am multi-instrument.
A standard Cessna , stripped for weight and equipped with a ballistic recovery system could “land” anywhere , even places where a helicopter cannot follow due to dense growth.
You can build a fiberglass canard airplane that cane hold 4 people or about 1200 pounds and is nearly invisible to radar.
With about as much radar imprint as this foolish stuff.