Here's my receiver mounted set-up.
http://209.190.4.227/gallery/displayimage.php?album=333&pos=9
Adjustable for height and can take any configuration of crossbar you care to make. Front bar is an old wooden one with suction cup feet. Same benefits. It can easily be modified to take any cradles or safety blocks you might need.
I chose this design because I wanted to keep my tonneau cover buttoned up. It's the only place I have to conceal paddles and other bulky gear.

: Any of you have a good idea for a rear rack for a pickup truck without a cap?
: I know there are options out there, but would rather not go the $200 -
: $500 route, and don't want just a wood 2x4 frame. Please share some
: idea's.

: Wade