While I'd hate to have to defend my position in court, I'd say "GFCI's needed."
Looking at other 'sort of damp' places, such as kitchens, garages, and basements, we see a pattern of GFCI's being called for. I'd extend this logic to the porch. At $10 each, it's not a cost to sweat about.
I would, however, see no need for outdoor covers ... and 'bubble' covers would be plain silly.