Re these requirements of "suspended above our gear for ventilation to keep it cooler. Can be pitched very low on the northern side as well as reasonably low on the eastern and western sides to protect gear from direct sun all day. Can have the southern side raised for access in the evenings and lowered during the day to keep it all out of sight" --
To "store" car-camping stuff (ice chest, grill, charcoal, fire wood, fishing gear, etc.) with protection from sun and elements, we pitch an Oware Alphamid (not the silnylon version, but the less expensive urethane coated nylon version).
Quick and easy to set up with a single adjustable length pole and 6 stakes (one stake at each corner, a fifth stake for guyline running from top of pole, and the sixth stake for mid-panel tieout on rear wall).
The Alphamid provides three-sided protection with easy access thru full length, top-to-bottom zipper on the flat side.
For sun/rain protection while hanging around campsite, we use an REI Screen House with Fly -- pretty expensive, especially since the fly and the screen house are sold separately, but can be had for a whole lot less when REI has a "big" sale.