if it is for a daily driver, i bet you would end up not using a cover since you have it under a carport. i have several car covers but no longer use them on cars that sit outside, only the inside. there is a new type of cover that looks interesting
www.touchlesscarcover.com . it deosn't actually touch the car ( no scrathcing) and you can set it up to drive in and out (convenient) . i was thinking if i modified my deck to be a carport and parked a car there that would be used fairly regulry, i may try it.