??? Which is Considered to be the Best Coil Antenna Out There:

[BOOTY MONSTER]

you can certainly try that , but it's gonna be a very very small ground plane for a quarter wave . they typically work better with 3 or 4 full 1/4 wavelength (9 ft on the CB band) ground elements . since your patio cover is aluminum id mount the vertical in the middle and use the aluminum cover as a ground element since it's (i'm assuming) much much larger than a 3x6 or 4x4 sheet of sheet metal . be sure to let us know your results with the tripod and sheet metal .